The Blues came agonisingly close to landing the Brazilian superstar over the summer, only to see Manchester City pick their pocket on deadline day.
He has proven to be an instant hit at Eastlands, adapting quickly to the rigours of life in the Premier League.
Robinho insists he is perfectly happy at City at present, but he can do little to stop the rumour mill from suggesting all may not be as it seems.
Chelsea are still believed to be keen on the Real Madrid man and may yet launch another pre-season raid for his services.
AttractiveWhether Hiddink, who is only contracted with the Blues until the end of the season, will be around at Stamford Bridge to make such an approach remains to be seen, but the Dutchman admits he is a long-time admirer of Robinho's talents.
"He is a very attractive player, but Manchester City have a lot of plans, so let us see what the future holds," said Hiddink.
"I tried to sign him when I was the manager at PSV and we were very close.
"We thought then that before going to the big leagues like La Liga or the Premier League it would be good for him to get used to Champions League football at a different level.
"We were close, very close, to signing him. I saw him several times in Brazil and I liked very much what I saw. It's difficult to stop players like him, but it's also very attractive to see their style."