During that 2014 run in Melbourne, Wawrinka won a five-set thriller against Djokovic in the quarterfinal, avenging his loss against the Serb which he faced in the same round of the same event in 2013.
So with tennis great Rafael Nadal about to retire after one final Davis Cup tournament, who better than RogerFederer to put an incredible career — and a rare friendship — in perspective.