Welshman Oliver Farr missed the chance to take the outright lead at the Trophee Hassan II on Friday after making a bogey on the last hole, and was in a four-way tie after a 4-under 68.
Farr had four birdies on the back nine to share the lead with Scotsman Richie Ramsay, Spaniard Rafa Cabrera-Bello and Australian Richard Green at 6-under 138.
Ramsay surged up the leaderboard with a 66, while Cabrera-Bello had five birdies and two bogeys in his round of 69. Green shot a 70.
South African George Coetzee, who needs to win to reach the Masters in two weeks, is in a group of five players who are a shot behind the leaders.