Gael Monfils on full stretch against Dominic Thiem during their fourth-round match at the Australian Open.Fabio Fognini prepares to pound his backhand during ATP Cup play.Grigor Dimitrov in full flight in Vienna. Yoshihito Nishioka cracks his two-hander during ATP Cup action. Casper Ruud flicks a tweener vs. Dominic Thiem at Roland Garros.Dreadlocks flying, Dustin Brown commits to the follow through. Stan Wawrinka is fully focused at the Australian Open.Feliciano Lopez fires the running forehand vs. compatriot Rafael Nadal at the Paris Rolex Masters.
