Andy Murray is hopeful that his training stint in Miami will help him succeed in the Rogers Cup.
The 27-year-old, who crashed out of Wimbledon at the quarter-final stage last month, had to undergo surgery on his back last September which ruled him out of competition for three months.
Asked how he feels a year on from the operation, Murray told BBC Sport: "I started to feel good, actually, just before the French Open. The back felt fine throughout the grass-court season.
"The only problem was before that I was able to practise but not train off the court, do the stuff in the gym that makes you physically strong. So when I was coming up against the better players, I was just lacking a little bit.
"But after Wimbledon, I went over to Miami and I really trained like I used to for the first time since the surgery and I felt much better."
Murray recorded a comfortable straight-sets victory over Nick Kyrgios yesterday to advance through to the third round of the Rogers Cup.
