Mickelson praises Spieth loyalty

“For him to go back, despite the opportunity to continue on with the third leg of the grand slam, shows a lot of class on his part."

Phil Mickelson has praised Jordan Spieth’s loyalty after the Masters and US Open champion honoured his commitment to play in the John Deere Classic.

Spieth is halfway towards an unprecedented calendar grand slam following his wins at Augusta National and Chambers Bay, but will arguably not have the ideal preparation for next week’s Open Championship.