Australian Open Day 11: Key clashes to watch out for

As the second set of quarterfinal matches get underway at the Australian Open on Wednesday, here's a look at some of the exciting clashes in store.

Roger Federer will take on Tomas Berdych for the fifth time in the Australian Open when the two clash on Wednesday.

Here's a compilation of the exciting clashes to look out for on day 11 of the Australian Open.

Roger Federer vs Tomas Berdych

Defending champion and five-time winner Roger Federer will face old foe Tomas Berdych in the last-eight stage. The Swiss second seed was too strong for the 80th-ranked Marton Fucsovics, winning 6-4, 7-6 (7/3), 6-2 in just over two hours on Monday.

READ: Cilic storms into semifinal as Nadal retires

Tomas Berdych powered past Fabio Fognini in a 6-1, 6-4, 6-4 win to advance to the quarterfinal. The Czech, seeded 19 and a two-time semifinalist in Melbourneis in his seventh quarterfinal in his 15th Australian Open appearance.

Federer will take on Berdych for a fifth time at the Australian Open, while the Czech still searches for a first win over the 19-time slam champion in Melbourne.

Simona Halep vs Karolina Pliskova

In perhaps the most interesting clash in the women's draw so far, world number one Simona Halep takes on former world number one Karolina Pliskova for a spot in the last-four.

Two-time French Open runner-up, Halep reached the quarterfinal for the third time courtesy of a 6-3, 6-2 victory over Naomi Osaka on Monday, while Pliskova overcame Czech compatriot Barbora Strycova 6-7 (5-7), 6-3, 6-2.

It will be a key contest as both women are raring to win their career's first Grand Slam title.

Hyeon Chung vs Tennys Sandren

Hyeon Chung registered the biggest win of his career by packing off Novak Djokovic 7-6(4), 7-5, 7-6(3) to enter the quarterfinals in the first Grand Slam of the year. Cbung faces fellow first-timer Tennys Sandgren on Wednesday.

Sandgren's fairytale run continued when he ousted fifth seed Dominic Thiem 6-2, 4-6, 7-6 (7-4), 6-7 (7-9), 6-3 to become the first player since Nicolas Escude in 1998 to make the last eight of the Australian Open on his main-draw debut.

Angelique Kerber vs Madison Keys

The last remaining grand slam winner in the women's draw, 2016 Australian Open champion Angelique Kerber came from a set and 5-4 down to defeat Hsieh Su-wei 4-6, 7-5, 6-2 to reach the Australian Open quarterfinals, where she is pitted against a determined Madison Keys.

2015 Australian Open semifinalist Keys had an easier path to the last-eight as he brushed aside Caroline Garcia in a 6-3, 6-2 win in 68 minutes to set a date with Kerber.