Thiem floors Nadal, Zverev knocks out Wawrinka as youngsters gun into semis

Dominic Thiem shocked top seed Rafael Nadal and Alexander Zverev ousted former champion Stan Wawrinka as tennis's young pretenders stole a march on the old guard to reach the Australian Open semi-finals on Wednesday.

Austria's Thiem, 26, beat Nadal 7-6 (7/3), 7-6 (7/4), 4-6, 7-6 (8/6) -- his first win in six attempts at Grand Slams, including two French Open finals -- to end the 33-year-old's bid to equal Roger Federer's record 20 Major titles.

Earlier Zverev, 22, beat 2014 champion Wawrinka, 34, to go into a semi-final with Thiem, meaning that one of them will reach Sunday's final against Roger Federer or Novak Djokovic, who have won 12 of the last 14 Australian Open titles.

Thiem had Nadal's measure in the first two sets and he recovered from dropping the third to win the fourth-set tie-breaker, getting off the floor after falling to win one point and enjoying some luck from the net cord to set up the third and decisive match point.

"I was lucky in the right situation -- the net ...