Andre Agassi has taken aim at Jannik Sinner’s preparation after the world No. 1’s extraordinary second-round exit at Roland Garros, suggesting a failure in the Italian’s hydration strategy may have been behind one of the most shocking collapses in recent Grand Slam memory. Sinner arrived in Paris as the overwhelming favorite to win a first French Open title and complete the career Grand Slam. He was two sets up and leading 5-1 in the third against world No. 56 Juan Manuel Cerundolo before his