'Settled' Rory McIlroy praises Jordan Spieth's resilience ahead of US PGA Championship

Rory McIlroy believes Jordan Spieth has a priceless ability to dig himself out of seemingly hopeless situations as the pair prepare to do battle for the US PGA Championship.

Spieth's dramatic Open victory at Royal Birkdale means he needs to win the final major of the year to become the youngest player - and only the sixth ever - to complete a career grand slam.