ATP champion Tsitsipas out of Saint Petersburg Open

ATP finals champion

Stefanos Tsitsipas

has pulled out of the

Saint Petersburg Open

because he is still suffering from an injury aggravated during his plucky semi-final loss to Novak Djokovic at

Roland Garros

.


The 22-year-old took Djokovic to five sets and says that effort aggravated a

leg injury

, but that he hopes to be back in action at Vienna from October 26.

"I hope to play in Vienna, Paris and London (I just found out that I have qualified and I am so pumped to have the opportunity to defend my title)", said the 2019 Masters champion.