Rory McIlroy was fully invested in his friend Shane Lowry's performance during the final round of the Truist Championship on Sunday. The Northern Irishman saw his own title defence fall short, finishing six shots behind winner Sepp Straka after carding a round of 68.

Sepp Straka took advantage of Shane Lowry's late mistakes to win the Truist Championship as the Irishman missed out on a $3.6 million first prize in Pennsylvania

Ahead of the upcoming PGA Championship at Quail Hollow, Rory McIlroy has admitted he has seen a big difference in his close friend Shane Lowry's game since moving to America