Swiss Indoor Tennis : Wawrinka Wins Epic Match Before Withdrawal
Stan Wawrinka Edged out American Frances Tiafoe 6-3, 3-6 and 7-5 but was forced to withdraw from his mouthwatering Swiss Indoors Basel Quarter-Final with Roger Federer afterwards due to a lower back injury.
Third seeded Stefanos Tsitsipas avoided an upset as he had to come from a set down to see off Lithuanian Ricardas Berankis 6-7, 6-2 and 6-4 in over two hours.
Tsitsipas will meet Filip Krajinovic in the quarters after the Serbian proved too strong for Fabio Fognini, dispatching the World's 12th ranked player 6-2 and 6-4.
Roberto Bautista Agut meanwhile kept his hopes of a maiden ATP Finals appearance alive with a hard-fought 6-2 4-6 6-3 win over French Veteran Richard Gasquet for a 40th victory of the season.