Australian Open: The Grand Slam is finally in its full flow, and has seen some exciting tennis. Defending champion Sofia Kenin has been knocked out.

Simona Halep had to dig deep for a come-from-behind win against Kaia Kanepi in the first round of the Australian Open.

It was a second straight first-round exit at Flushing Meadows for Romania's Simona Halep, who dropped her opening match to Maria Sharapova last year.

Monica Puig, seeded eighth in the event and ranked 48th in the world, outlasted 92nd-placed Watson 6-4, 6-4 in 94 minutes.

Others who have pulled off big upsets at this tournament were not able to follow up those victories. Steve Darcis, who defeated Rafael Nadal in the first round, withdrew from his second-round match because of a shoulder injury he sustained against Nadal. Sergiy Stakhovsky, who beat Roger Federer in the second round, lost in the next round, saying he was not prepa...

Showing no drop-off after her dramatic victory over Williams, the 23rd-seeded German returned on Tuesday and made quick work of a much less intimidating opponent, 46th-ranked Kaia Kanepi

Fourth-seeded Radwanska, the highest seed left following the exit of defending champion Williams, Victoria Azarenka and Maria Sharapova, beat Li, the sixth seed, 7-6 (7/5), 4-6, 6-2.

Britain's dreams of a first woman in the Wimbledon quarter-finals for 29 years were shattered on Monday when Laura Robson bowed out in tears after falling to Estonia's Kaia Kanepi.

Angelique Kerber's Facebook page received a string of abusive messages including a death threat as well as one wanting her to break her arms while another demanded the tie be investigated for match-fixing.

Sania and Huber will now fight it out with Romania's Monica Niculescu and Czech Republic's Klara Zakopalova for a place in the semifinals.