Roger Federer put his global army of "Fed-Head" fans through the wringer for four nerve-shredding sets before he kept alive his pursuit of a record eighth Wimbledon title with a 6-7(4), 4-6, 6-3, 7-6(9), 6-3 win over Marin Cilic the quarter-finals on Wednesday. Novak Djokovic's shock third round exit had raised hopes that this could be the week when the Swiss finally ends his four-year hunt for an 18th Grand Slam title, as the Serb had been the only man to beat him at the majors over the past year. However, all those expectations appeared to be heading for the dustbin as Cilic stood one point away from victory -- not once, not twice but three times in a pulsating fourth set that had everyone on the edge of their seats.