Stan Wawrinka continues to add good feelings. Or so he pretends.
He had another bad start but continues to win at the Prague Challenger where he is already in the semi-finals.
The former World No. 3 (today the 17th ATP) again had ups and downs but passed the test against the Indian Sumit Nagal (127th) whom he defeated 2-6, 6-0 and 6-1.
His next rival will be the local Michael Vrbensky (402 °) who surprised the Swede Elias Ymer.