"It's always difficult, especially the U.S. Open, the last of the Grand Slams. It's always tough because you know, the season is very long. I really played a lot this year. Sometimes it's really hard to stay focused all the time because you're really tired after the whole season."
Agnieszka Radwanska is a Polish former professional tennis player. She reached a career-high world ranking of No. 2 and was known for tactical, creative shot-making. She won the WTA Finals in 2015 and was a Wimbledon finalist in 2012.