Tweets of the week: ATP, WTA stars celebrate on New Year's Eve

The stars of the ATP and WTA shared their best photos from parties around the world on New Year's Eve, while others gave a look into their training for the 2015 season. Here are some of the week's best tweets.

[tweet=https://twitter.com/serenawilliams/status/550450495262040064]

[tweet=https://twitter.com/DjokerNole/status/550386795641176064]

[tweet=https://twitter.com/ARadwanska/status/550299392453132289]

[tweet=https://twitter.com/Venuseswilliams/status/550385151335989248]

[tweet=https://twitter.com/Fulvia_Fognini/status/550357771644698625]

[tweet=https://twitter.com/laurarobson5/status/550459487430397952]

[tweet=https://twitter.com/pmouratoglou/status/550019946260873216]

[tweet=https://twitter.com/germanotes/status/549985222662844416]

[tweet=https://twitter.com/rogerfederer/status/549905751175856128]

[tweet=https://twitter.com/andy_murray/status/550393045167124480]

[tweet=https://twitter.com/bambamsam30/status/550845643737272320]

[tweet=https://twitter.com/geniebouchard/status/550904456913510402]

[tweet=https://twitter.com/vika7/status/550838689660547073]

[tweet=https://twitter.com/ARadwanska/status/550752961412874240]

[tweet=https://twitter.com/MardyFish/status/550688901841444865]

[tweet=https://twitter.com/flavia_pennetta/status/550463375767920640]

[tweet=https://twitter.com/MariaSharapova/status/550800338828021761]