Paul di Resta has admitted speculation about a potential drive with the Brackley-based Mercedes team next season is "a positive."

Di Resta's performances after just three grands prix on his Formula One debut campaign with Silverstone-based Force India have attracted the attention of many observers. In particular, Mercedes Motorsport vice-president Norbert Haug has described Di Resta's displays as "exceptional."

"You are always interested if teams like that (Mercedes) are interested," said Di Resta "I definitely, one day, would like to be in a position for that, but at the same time I have said I am with Force India."

He added: "I am fully focused on what I signed to do this year, and that is to drive for Force India and do the best job here.

"I will continue to focus on that path because there is still a long way to go and a lot up for grabs. You never know for the future. I will just continue eyes forward and go on with what I have got set out, and there is a long way to go."

Asked, though, whether the Mercedes link was a compliment, the 25 -year-old added: "Yeah, it's been positive."

Fuel is added to the fire by the fact Di Resta drove for Mercedes in DTM (German touring cars) over the last four years, winning the title last season.

Considering Mercedes also provide engines to Force India, it has been suggested Di Resta might not have made it into F1 without their help.

It is perhaps doing him a disservice given his talent, but he said: "It is a question you will never know, a question you cannot answer because you have not done it.

"I have always said Mercedes have been a great influence on my career and I have been part of that family for a long time. I've enjoyed it and I am still very close to them, but it is a question you will never know the answer to because I've not gone that route."