Del Potro, Cilic through as Dimitrov falls again

Juan Martin del Potro and Marin Cilic made it safely into the last 16 of the Miami Open on Sunday, but third seed Grigor Dimitrov crashed out with another disappointing defeat.

Del Potro, a winner at Indian Wells last time out, crushed Kei Nishikori 6-2, 6-2 to advance while Cilic was made to work by Vasek Pospisil before eventually progressing 7-5, 7-6(7-4).

The fifth seed had too much for Nishikori as he racked up his 13th consecutive win, the Japanese star continuing his comeback from injury problems.

The Argentine used his trademark big serve and bomb of a forehand to finish off Nishikori in just 72-minutes.

He will play Filip Krajinovic after the 22nd seed saw off Novak Djokovic’s conqueror Benoit Paire 6-3, 6-3.

Second seed Cilic, the highest remaining seed after Roger Federer’s shock exit, reached the fourth round in Miami for just the third time after a tough win over Canada’s Pospisil.

One break of serve in game 12 was enough for the first set, while the second was won on a tie-break after Pospisil saved three match points, again in game 12.

Also into the last 16 were John Isner (14) after a 6-4, 6-3, win over Russia’s Mikhail Youzny and Jeremy Chardy, who took out third seed Grigor Dimitrov 6-4, 6-4.

It marked a fourth defeat in five matches for the Bulgarian.

South Korea’s Hyeon Chung sealed his place in the last 16 with a 6-1, 6-1 victory over America’s Michael Mmoh in just 62 minutes.

He will face Joao Sousa in the fourth round after the Portuguese defeated Jared Donaldson 1-6, 6-4, 6-4.