"When I started, I still played guys who volleyed extremely well back then, like Pat [Rafter] for instance or [Tim] Henman, Todd Martin.
"I played against many of those guys in the faster conditions so for me sometimes the only way to win points was to come to the net.
"For me, it felt very natural.
"Then obviously everything slowed down, the strings changed, the racquets changed a little bit and then I had to adapt as well to a new era, a new generation.
"Those guys started to bow out of the game and all the new players who came through were a lot of baseliners. There was a lot of topspin, there was a lot of physicality.
"So things changed and I'm happy that I was actually able to live through that drastic generation change as well.
"I was able to do both because I did grow up on outdoor clay and indoor supreme and that helped me to play as well in all conditions."
Quarter-final matches
1 Victoria Azarenka (Belarus) v Svetlana Kuznetsova (Russia)
3 Serena Williams (US) v Sloane Stephens (US)
3 Andy Murray (Britain) v Jeremy Chardy (France)
2 Roger Federer (Switzerland) v 7-Jo-Wilfried Tsonga (France)
-AAP