Bernie Ecclestone admitted on Monday that he was somewhat disappointed with Fernando Alonso's performances in 2013 and hinted that the two-time World Champion has been looking for a move away from Ferrari.
Alonso finished the season in second place in the Drivers' Championship standings behind Sebastian Vettel for the third time in four years, but his performances couldn't help Ferrari finish higher than third in the Constructors' Champs.
McLaren had made no secret previously that they would welcome the Spaniard back to Woking after he spent an unsuccessful season there in 2007 if he was open to the move.
"I've been a little bit disappointed in Fernando because I'm a big supporter of him and of Ferrari," Ecclestone wrote the official Formula One website's season review.
"I thought he gave up a little bit which is proof that he was looking for another team.
"I don't know whether the team is not competitive because of him or because the people who are running the team aren't getting the job done."
Ecclestone added that Sebastian Vettel is arguably the best Formula One driver of the last 50 years after the German won the last nine races of the season to win his fourth consecutive Drivers' title.
"You probably have to say he's number one of the drivers I've known," Ecclesone added before suggesting that Kimi Raikkonen was the best driver of the year.
"This year I suppose I have to call Kimi the star driver, with the equipment he has.
"I think he was motivated on hope that he was going to get paid. He's a good guy to have in a team. He's super, he's a racer."
The 83-year-old Ecclestone was also impressed with Pirelli, despite complaints from the paddock about the rapid degradation of their tyres.
"Pirelli did a wonderful job for us. I told them we don't want tyres that last the race, we want tyres that nobody knows how they are going to last. We've also got that with the new engines next year," he continued.
However, Ecclestone believes the new FIA regulations which sees teams switch from to V8 engines will have a negative effect on spectator numbers.
"I still think what we have now is good, I don't think there was any need to change it," he concluded.