Rory McIlroy struggles at Bay Hill

England's Matt Fitzpatrick claimed a share of the lead in the Arnold Palmer Invitational as pre-tournament favourites Rory McIlroy and Henrik Stenson struggled to make an impression.

Fitzpatrick carded a flawless 67 at Bay Hill to join Argentina's Emiliano Grillo at the top of the leaderboard, with compatriot Paul Casey a shot behind alongside Lucas Glover and Charley Hoffman.

In contrast, McIlroy's 74 included four bogeys and a double bogey, while Stenson - who has finished in the top 15 in his last five appearances in the event - double-bogeyed the 18th in a 75 matched by Blayne Barber.