Andy Murray has said that there is room for improvement following his BNP Paribas Open third-round victory over Philipp Kolschreiber at Indian Wells.
Murray needed three sets to defeat the German in a 6-1 3-6 6-1 win.
"In the first set I was dictating the rallies, the ball was bouncing high and I was pushing him away," Murray told Sky Sports News.
"In the second set there was a break point at 3-3, it gave him confidence, but in the third set I started dictating points again and getting good height on the ball.
"I feel I can serve better, serve smarter than I did today. Philipp's not one of the taller players so when I can get it to bounce high it makes it tough for him on the return."
Murray will play Adrian Mannarino in the fourth round after the Frenchman beat Ernests Gulbis 6-4 6-4.
