I’ll say first of all how much I like Jankovic as a tennis player – lovely mixture of power and style. Her Wimbeldon mixed doubles win last year with Jamie Murray was a highpoint of the year as the two played with a huge sense of fun.
I think however her agent or whoever controls her career needs to sit back and look very carefully at how they are manageing her. She withdrew last night with a thigh strain from the Hopman Cup game Serena Williams. This is after being forced to retire with the same strain in the two previous games – she also played a doubles match with Djokovic in between these games

. She has now retired or withdrew in 5 of her last 9 singles games. The possibility of doing serious long term damage to hersef must be pretty high at this stage.
Her problem in a nutshell is that she plays far too many matches – last year she competitively played 94 singles games and 18 doubles games. That excludes some exhibition games and a handful of mixed doubles games. It is an absolutely insane schedule and I don’t see why she needs play so many games. Burn out ala Capriati is looming yet she continues to play on.
She’ll no doubt turn up in Oz with a heavily strapped thigh and will be worth opposing as a shock would not surprise me at all.