5 World No.1 players who have never won the US Open

#4. Victoria Azarenka

Azarenka was beaten by Serena Williams on both occasions when she reached the final

Easily the best tennis player Belarus has ever produced, Victoria Azarenka has been one of the finest hardcourt players in recent times with both her Grand Slam titles coming at the Australian Open. Azarenka has been the World No.1 for a total 51 weeks and was considered tough competition for the likes of Serena Williams before a foot injury in 2014 triggered a downfall.Despite being an excellent hardcourt player, the offensive baseliner is yet to win a US Open title, having come agonizingly close to win the title on two consecutive occasions in 2012 and 2013. Azarenka lost to Serena Williams in three sets on both occasions. In the 2012 final, Williams easily took the first set 6-2 but Azarenka rallied back to take the second set 6-2. The third set was pretty intense and Azarenka was actually serving for the match at 5-4 but Williams fought back and took the third set 7-5. Williams won the 2013 final in almost similar fashion; only this time the third set was one-sided.

After losing the first set 5-7, Azarenka levelled the match by taking the second set 7-6 but she was no match for Williams in the third set, losing 1-6.

The pregnant player has now taken a break from tennis, and has said she is likely to return following a maternity break.