Updated On: 19 April, 2016 10:18 AM IST | | PTI
<p>Tennis is going through "tricky" times amid the swirling "rumours" of doping and betting, concedes Novak Djokovic but the World No.1 says he would not question the sport's integrity till the time concrete evidence is presented to prove wrongdoing</p>

Novak Djokovic
Berlin: Tennis is going through "tricky" times amid the swirling "rumours" of doping and betting, concedes Novak Djokovic but the World No.1 says he would not question the sport's integrity till the time concrete evidence is presented to prove wrongdoing.

Novak Djokovic. Pic/AFP