Paul Waring saw his lead cut to a single shot after the third round of the Abu Dhabi HSBC Championship.
The Englishman started the day five clear but a one-over 73 left the door ajar for the chasing pack.
Waring's 18-under-par total is one clear of Niklas Norgaard, with Tommy Fleetwood, Shane Lowry, Thorbjørn Olesen and Sebastian Söderberg tied for third on 15 under.
Waring found a bunker with his opening tee shot and had to scramble par from eight feet at the first, but looked to have settled down as he birdied the par-five second and hit his tee shot to eight feet at the short fourth.
However, he ran his birdie attempt five feet past and missed the return, before missing birdie putts at the next nine holes.
Finding sand off the tee at the 14th proved costly as he failed to save par from 15 feet.
Waring had produced the shot of his life with a fairway wood to inside four feet at the last on Friday, but 24 hours later ended up in a greenside bunker and had to settle for a 15th par of the day.
Norgaard had four birdies against a single dropped shot in his 69 and admitted he is starting to feel like he belongs at big events following his first DP World Tour win at the Betfred British Masters hosted by Sir Nick Faldo.
Cristiano Ronaldo became the first player to score in six World Cups and Portugal’s all-time leading marksman at the global finals with two goals in Tuesday’s emphatic 5-0 Group K win over Uzbekistan in Houston.
The United States eased restrictions on the Iran squad's travel arrangements at the World Cup on Tuesday, allowing them to travel two days before their next match, the US Department of Homeland Security said.
Former Lucknow Super Giants captain Rishabh Pant will return to the Delhi Capitals while spinner Kuldeep Yadav will move the other way in a high-profile player trade in the Indian Premier League (IPL), the organisers said on Tuesday.
Algeria stormed back to beat Jordan 2-1 and eliminate the World Cup debutants with a match to spare on Monday thanks to second-half goals from substitute Nadhir Benbouali and Amine Gouiri.
Kylian Mbappe has scored his second double of the tournament as France eased into the last 32 with a 3-0 victory over Iraq on Monday in the first match of this World Cup beset by a lengthy weather stoppage.
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