Juan Martin del Potro continues to sizzle as he reaches Miami Open quarter-finals

The towering Argentinean extended his winning streak to 14 matches as he defeated Filip Krajinovic to reach the quarter-finals of the Miami Open.

The world number six’s excellent run of form continued as he fought back from 1-4 down in the first set to beat the 22nd seed 6-4 6-2.

The Argentinian, on the back of his triumph at Indian Wells, improves his record to a career best 20-3 start to the year.

He will now go on to face Milos Raonic, who overcame Jeremy Chardy 6-3 6-4, winning 85% of his first service points and winning a break in the final game to see out the match.

Croatia’s Borna Coric, meanwhile, denied Denis Shapovalov a place in the last eight, beating the Canadian 7-6 (7/2) 4-6 6-4 after two hours, 17 minutes on court.

A 33-shot rally in the third set saw Coric move ahead before three double faults from his 18-year-old opponent gave him the opportunity to seize on two match points.

American Frances Tiafoe appeared on court twice, first to finish off his defeat of Tomas Berdych 6-7 (2/7) 6-2 7-6 (7/1) after rain interrupted play the day before, and then to face Kevin Anderson in pursuit of a quarter-final place.

Anderson proved to be stronger on the day, hitting 22 winners and nine aces to claim the match 7-6 (7/3) 6-4 and set up his fifth quarter-final of the season.

Elsewhere in Miami, second seed Marin Cilic suffered an upset after John Isner advanced to the quarter-final 7-6 (7/0) 6-3. He will be joined by Spain’s Pablo Carreno Busta, who saw off compatriot Fernando Verdasco 6-3 6-3, and Hyeon Chung, who beat Joao Sousa 6-4 6-3.

In a late game, Alex Zverev claimed the final spot in the final eight, topping Nick Kyrgios 6-4 6-4 after the Australian notched up 27 unforced errors compared with just 13 for the German.