Britain's Andy Murray fought back for a 4-6 6-3 6-4 win over Serbian Janko Tipsarevic to reach the Sony Ericsson Open semi-finals on Wednesday.

Murray, the world number four, trailed by a set and a break before receiving medical attention for what appeared to be a stomach problem. The Scot then promptly turned the match around as he broke the next service game from ninth seed Tipsarevic and went on to clinch the second set.

Murray, whose backhand was below par and who made 34 unforced errors, then broke in the third game of the final set and held firm with his serve to ensure a last-four match against Rafa Nadal or Jo-Wilfried Tsonga who play later on Wednesday.