Andy Murray edges past Grigor Dimitrov in Miami

Andy Murray has progressed to the last 16 of the Miami Masters courtesy of a hard-fought win over Grigor Dimitrov.

Murray beat the Bulgarian 7-6(7-3), 6-3, but the Scot was made to work for his straight-sets victory.

Murray was broken in the fourth game of the first set before breaking back immediately. He lost his next service game, however, to hand Dimitrov the initiative.

The Scot managed to save two set points with the score at 5-3 before winning that game and breaking Dimitrov in the next - helped largely by three double faults by the Bulgarian - to eventually set up a tiebreak win.

Murray was in better form in the second set, breaking Dimitrov straight away to race into a 3-0 lead before holding his serve to win the set 6-3 and move into the next round.