All eyes were on Caroline Wozniacki as 2011 began in Melbourne. She was ranked No. 1 in the world; the question was, when was she going to back up that gaudy number with her first Grand Slam title?

Danish No 1 Holger Rune could be a significant injury doubt ... of playing alongside compatriot and former world No 1 Caroline Wozniacki in the mixed doubles competition. Speaking to InsideSport ...

After reaching her ninth semifinal of the year in Montreal, Iga Swiatek spends her 72nd week at No. 1 this week, surpassing Caroline Wozniacki ... breakthrough: Holger Rune moves up from No ...