Alex Zverev

Dominic Thiem ended six years of Grand Slam frustration against Rafa Nadal on Jan. 29 with a seismic 7-6(3) 7-6(4) 4-6 7-6(6) upset that booked his maiden Australian Open semi-final and rocked the old guard of men's tennis.

Bulgarian fourth seed Grigor Dimitrov reached his first Monte Carlo Masters semi-final with a hard-fought win over Belgium's David Goffin.

Dimitrov, 26, won 6-4 7-6 (7-5) against sixth seed Goffin, who was leading 5-1 in the second set.

Spain's world number one Rafael Nadal takes on Austrian third seed Dominic Thiem with the winner playing Dimitrov.