Alcaraz's tennis is so often a highlight reel but on grass, he does his most devastating work in the negative spaces of points.

Defending Wimbledon champion Carlos Alcaraz was given another tough litmus test by plucky German Jan-Lennard Struff but the second seed battled his way to a 6-1 3-6 6-3 6-4 victory and reached the fourth round on Friday.

Carlos Alcaraz survived another erratic performance on Friday, battling to a 6-1, 3-6, 6-3, 6-4 win over Germany's Jan-Lennard Struff to stay on track for a third straight Wimbledon crown.