(CNN)-- Roger Federer is undoubtedly the greatest men's tennis players of the modern era -- if not of all time -- following his epic victory over Andy Roddick in Sunday's Wimbledon final.

Here, we look at the six longest winning streaks at Wimbledon in men’s singles in the Open Era. After losing to Roger Federer in the 2006 and 2007 Wimbledon finals, Rafael Nadal won 20 straight ...