“My mind has really been thinking about my nan back home because she had a nasty fall. Thankfully she is making a recovery and maybe taking my mind away from the golf has been a good thing.”
Webster started his second round with 11 pars but then recorded three birdies and two bogeys in his last seven holes.
Warren has not made it to the weekend at an event since March but the 2014 champion fired the lowest round of the day with a seven-under-par 64, while Horsey – the man who took the title off him in 2015 – signed for a 68.
Dunne made five birdies and three bogeys in a 68, while Chawrasia maintained his bogey-free week in recording the same score.
Russell Henley holds a one-stroke lead from fellow American and world number one Dustin Johnson after the first round of the Northern Trust.
Henley, 28, shot three birdies in his first six holes on his way to a six-under-par 64 in Old Westbury, New York.
Johnson only dropped one shot in the first of the PGA Tour’s four FedEx Cup play-off events, as defending champion Rory McIlroy carded a three-over 73.
“I hit a lot of really good shots,” said Johnson, 33.
“I drove it well, did everything really well. It’s the first time in a long time I’ve done that.”
Johnson retains the top spot despite struggling to find the form that resulted in three victories heading into the Masters in April, when he was forced to pull out after slipping and injuring his back on the eve of the tournament.
“Today was the first time it’s kind of felt – the golf swing – I was in control, like I was leading into the Masters,” he added.
Justin Rose finished the day on two under par, while fellow Englishman Paul Casey and Martin Laird of Scotland are a stroke further back.
-7 W Ormsby (NZ), S Webster (Eng), M Wallace (Eng); -6 O Lengden (Swe), B Hebert (Fra), R Karlsson (Swe)
Selected others: -5 P Waring, J Parry, J Morrison (all Eng); -4 P Dunne (Ire), J Daly (US), T Lewis (Eng); -2 M Kaymer (Ger), N Colsaerts (Bel)
England’s Steve Webster and Matt Wallace hold a share of the lead after the first round of the Made in Denmark European Tour event in Farso.
Webster, 42, is aiming for his first Tour win in 10 years, while 27-year-old Wallace won the Portugal Open in May.
Both men recorded rounds of seven-under 64, as did New Zealand’s Wade Ormsby.
Webster did not drop a shot in his round while Wallace would have had the overnight lead had he not bogeyed the 18th hole.
France’s Benjamin Hebert and the Swedish pair of Oscar Lengden and Robert Karlsson are a shot further back, while English trio Paul Waring, John Parry and James Morrison are among 10 men on five under.
Rory McIlroy says he aims to play in five more events this year before taking an extended break to aid his recovery from a rib injury.
FedEx Cup holder McIlroy intends to play in all four play-off events in the US over the next month before competing in the Dunhill Links event in Scotland.
The play-offs begin with this week’s Northern Trust Open as McIlroy aims to get in contention to retain the title.
“I’m OK to play these next four out of five weeks,” McIlroy told ESPN.
“But then I do need a prolonged break at some point in 2017 to be ready for 2018.”
McIlroy had said he might not compete again in 2017 after finishing in a share of 22nd place at the US PGA Championship but last Friday confirmed his intention to attempt to defend his FedEx Cup crown.
McIlroy without a win in 2017
McIlroy is 43rd in the FedEx Cup standings and will need to move into the top 30 in order to earn entry to the concluding Tour Championship.
The Northern Irishman won the second play-offs event in 2016 before clinching a £7.8m bonus as he topped the FedEx Cup standings after triumphing at the Tour Championship.
The play-offs begin with the New York event before next week’s Dell Technologies Championship in Boston.
After a week’s break, the series resumes with the BMW Championship in Illinois before the Tour Championship in Atlanta.
McIlroy said on Tuesday that Harry Diamond will continue to caddie for him during the play-offs after he split with his long-time bagman JP Fitzgerald following The Open.
The US PGA was only McIlroy’s 13th tournament of a season in which he has not won.
McIlroy took six weeks off after losing out in a play-off for the South African Open in January and also missed the PGA Championship at Wentworth and the Memorial Tournament.
World number two Lexi Thompson was four down to Europe’s leading player Anna Nordqvist after nine holes, but rallied superbly to take the lead heading into the 18th of a high-quality match.
Nordqvist, who had won all three of her matches over the first two days despite still recovering from a bout of glandular fever, hit an inspired approach shot on the last to halve the match.
But the American team had the momentum and Kerr wrapped up a 2&1 victory over Mel Reid on the 17th and moments later Creamer won one up against Georgia Hall.
That left the hosts needing one more point to triumph but victories from Germany’s Caroline Masson, who beat Michelle Wie 3&2, and veteran Scot Catriona Matthew, who trailed all the way until the 15th before beating Stacy Lewis one up, made the scoreboard look more respectable.
Angel Yin looked like she would complete the hosts’ victory but she bogeyed the 17th and only halved her match with France’s Karine Icher.
Spain’s Carlota Ciganda thrashed Brittany Lincicome 4&3 before Salas held off England’s Ewart Shadoff for a one up victory on the 18th.
The United States won all four of Friday’s fourballs to lead the Solheim Cup 5½-2½ after day one in Iowa.
Europe, looking to regain the Cup from the US, took a narrow 2½-1½ lead after the opening foursomes.
Pairs Anna Nordqvist and Georgia Hall and Karine Icher and Catriona Matthew both picked up wins in the morning.
Saturday will see another morning of foursomes and an afternoon of fourballs before the contest will be decided by 12 singles matches on Sunday.
Despite the positive start, the visitors could not capitalise in the second session and their narrow lead was quickly erased.
Michelle Wie and Danielle Kang made a quick start for the US in their match, as Wie birdied the first two holes to put the pair two up against Sweden’s Madelene Sagstrom and England’s Jodi Ewart Shadoff.
They would eventually win the match 3&1.
Spain’s Carlota Ciganda and Denmark’s Emily Pedersen were thrashed 6&5 by Angel Yin and Lizette Salas – a win which ties the second largest margin of victory in a Solheim Cup fourball match.
In the third match England’s Florentyna Parker and Germany’s Caroline Masson were never ahead against Brittany Lincicome and Brittany Lang.
The pairs traded pars for the first four holes, before Lincicome made a birdie three on the fifth to edge the hosts in front. From there they didn’t let up, eventually winning the match 3&2.
The closest of the afternoon matches came in the final group with the English pairing of debutant Georgia Hull and Charley Hull taking on Stacy Lewis and Gerina Piller.
Piller’s birdie on the par-four sixth gave the Americans the lead in their match, and they were two up after seven when Lewis knocked in a birdie.
The English pair fought back three times to trail by one, and when Hull chipped in for eagle on the par-five 15th, it looked like momentum was on their side,
But Lewis was able to birdie the penultimate hole to win 2&1 and secure a clean sweep for America.
Sagstrom / Ewart Shadoff (Eur) v Wie / Kang (US) – US won 3&1
Ciganda / Pedersen (Eur) v Yin / Salas (US) – US won 6&5
Parker / Masson (Eur) v Lincicome / Lang (US) – US won 3&2
Hull / Hall (Eur) v Lewis / Piller (US) – US won 2&1
Europe edge morning foursomes
Underdogs Europe had taken an unlikely 2½-1½ lead after the opening foursomes on Friday after three of the opening four matches went to the final hole.
Mel Reid and Hull were two up with two to play but tied with American duo Cristie Kerr and Lexi Thompson in the top match.
Hall and Nordqvist beat Paula Creamer and Austin Ernst 3&1, but Ciganda and Caroline Masson lost narrowly to Danielle Kang and Salas.
Matthew and Icher then beat Stacy Lewis and Gerina Piller in a thrilling finish to the foursomes.
The pair were two down after 10 holes, but won three of the back nine to win on the 18th.
The hosts got off to the perfect start as Kerr and Thompson eagled the first hole, but Reid and Hull won three holes on the front nine to take control at the turn.
The all-English pairing looked to be in control of the tie, but Kerr sank her birdie putt on the 18th as the American pair battled back to earn a half.
Sweden’s Nordqvist was the standout player for Europe in the first session, paired with 21-year-old debutant Hall, as they dispatched Creamer and Ernst in style.
In the anchor match, the experience of Matthew helped Europe to a slender lead going into the four fourball matches.
The 47-year-old Scot – playing in her ninth Solheim Cup – was called up on Wednesday to replace the injured Suzann Pettersen.
Reid / Hull (Eur) v Kerr / Thompson (US) – halved
Ciganda / Masson (Eur) v Kang / Salas (US) – US won 1 up
Nordqvist / Hall (Eur) v Creamer / Ernst (US) – Europe won 3&1
Icher / Matthew (Eur) v Lewis / Piller (US) – Europe won 1 up
BBC golf correspondent Iain Carter
America’s strength in depth shone through as they took full control.
Rookie Danielle Kang was the stand out performer matching Lizette Salas in recording morning and afternoon victories. Angel Yin seems made for the Solheim Cup and the two Britttanys – Lang and Lincicome gelled with devastating effect.
By contrast, Europe are struggling despite an excellent debut from Dorset’s Georgia Hall. With Charley Hull hampered by a wrist injury, the visitors’ prospects appear bleak heading into the second day.