Aryna Sabalenka says she fell into 'deep, dark hole' mentally in shock defeat to Diana Shnaider
Diana Shnaider stuns world number one Aryna Sabalenka at Roland Garros to make semi-finals
Maja Chwalinska enjoying tennis again at Roland Garros run after battle with depression
Dominant Sabalenka eyes semis while Polish sensation and besieged Auger-Aliassime face threats
