Isner, Raonic progress in Melbourne

The big-serving duo of Milos Raonic and John Isner have booked their spots in the fourth round of the Australian Open.

The 10th-seeded Isner came from a set down to beat Feliciano Lopez, while Raonic, the 13th seed, downed Victor Troicki in straight sets.

Both Isner and Lopez are renowned for their powerful serves, and it appeared that the match would unravel without a break of serve when the pair shared grabbed a tiebreak apiece over the opening two sets.

However, the American stepped up a level in the third while Lopez, who had played a gruelling five-setter in the second round, began to tire. Isner secured the first break of serve to open the third set, with a second break seeing him take the third 6-2.

One break of serve was all that was required in the fourth for Isner to wrap up the match 6-7, 7-6, 6-2, 6-4, having sent down an incredible 44 aces while not facing a single break point.

Isner will come up against either compatriot Steve Johnson or eighth seed David Ferrer in the fourth round.

Raonic heads into the fouth round having not dropped a set in the tournament after he beat the 21st-seeded Troicki 6-2, 6-3, 6-4.

It was all too easy for the Canadian in the first two sets, winning 92 percent of points on his first serve in the opener and 100 percent in the second. However, the third set was not quite a walk in the park.

Unforced errors began to creep into Raonic’s game as Troicki did well to stand his ground and the Serbian took the initiative with an early break. However, Raonic regained his composure and broke back before securing the decisive second break to wrap up the match.

Raonic will face Stan Wawrinka in the fourth round.

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