Competing in the hometown of Basel for the 19th time, the nine-time champion Roger Federer is through to yet another semi-final after withdrawal from Stan Wawrinka. Thus, Roger is through to the last four in Basel for the 16th time (the 13th in a row since 2006), extending his record as the only player with that many semi-finals at a single ATP event, leaving his runs at the ATP Finals and Halle at 15.
Jimmy Connors (the US Open) and Rafael Nadal (Monte Carlo) are the only other players with 14 semi-finals at one event, leaving Roger all alone at the top of the list. Making the main draw debut in Basel in 1998 against Andre Agassi, Roger lost in the final in 2000 and 2001to Thomas Enqvist and Tim Henman, embracing shorter campaign in the next two years before skipping the home event in 2004 and 2005, missing a chance to play in front of partisan fans in the first dominant seasons on the Tour.
That all changed from 2006, with Federer reaching 12 consecutive finals at this prestigious indoor event and lifting the trophy nine times, losing three finals to Juan Martin del Potro and Novak Djokovic. Roger has won 59 of the last 62 encounters in Basel, rattling off three titles in a row before finishing runner-up to Novak Djokovic in 2009.
No one was there to stop Roger in 2010 and 2011 before Juan Martin del Potro took charge in the next two years, prevailing against Roger in three sets on both occasions before the Swiss bounced back from 2014, claiming four titles in a row and seeking the milestone tenth crown on Sunday if he beats Stefanos Tsitsipas in Saturday's semi-final encounter.