Radwanska: It's almost impossible to beat Serena right now

MELBOURNE—Agnieszka Radwanska, who lost in straight sets to Serena Williams in the semifinals of the Australian Open, admitted that it’s almost impossible to beat the American right now.

The 21-time Grand Slam champion is now 9-0 against world No. 4 Radwanska. She is 6-1 versus world No. 2 Simona Halep, 3-1 versus world No. 3 Garbine Muguruza, 19-2 versus world No. 5 Maria Sharapova, and 5-1 against world No. 7 Petra Kvitova. Williams has also taken 17 of 20 matches from Victoria Azarenka and five of six matches from Angelique Kerber, whom she will face in the final.

“If she's playing her game, it's [a] different level,” Radwanska said. “When you serve 190 [km/h] wide, I don't know who's going to take that. Definitely not me playing on that level. She really [is] showing her great tennis on all the Grand Slams. She really [is] showing she want[s] to win it. She's doing everything right. She goes on court and she just want[s] to kill it.

"Going, like, full power for everything. So I don't think anyone can really play on that kind of level at all.”