Flavio Briatore has said that a return to Ferrari cannot be ruled out for Fernando Alonso.
Briatore, the former Renault boss, continues to oversee Alonso's career in Formula 1.
Yet Briatore said that Ferrari is also a possibility for 2018, even though Alonso appeared to burn the bridge back to Maranello when he left three years ago.
"He always got along with everyone and only had problems with Mattiacci," Briatore, referring to the now-departed former Ferrari boss, told Italian radio Rai.
"In this life you cannot exclude anything. Fernando is a bit like Senna, who had no problem with any team - he only needs a car capable of winning."
However, there could also be other options for Alonso.
Briatore said: "In Formula 1 there are only two teams racing to win - Ferrari and Mercedes.
"McLaren can only be a top team if they change engines. We'll see. Red Bull and Force India can have good races, as we saw in Baku."
Alonso picked up his first two points on 2017 at last weekend's Azerbaijan Grand Prix.