Team Sky Principal Sir David Brailsford has refused to be drawn into the debate as to whether he will be signing Astana's Mikel Landa.
The winner of two stages in this year's Giro D'Italia is out of contract at the end of this year and the French press have suggested that he could be joining Team Sky.
However, Brailsford told CyclingNews.com: "I'll have to go and read it. There are 147 guys with contracts up and 14 of our guys have contracts up and you can read that we're probably trying to sign 147 of them. I wouldn't talk about anyone under contract with anybody else and I wouldn't speculate about what we're going to do with our riders.
"In a way I can sympathise with Martinelli because I've been there with Bradley and Chris in the past. It's not easy. He's a good manger and good DS. I think it's been obvious for a while that Landa has been climbing better than Aru since day one. Landa has been around for a while. He was a good junior but if you ask anyone who has known him for a long time he's a huge talent. From a climbing point of view he's been impressive."