Sir Jackie Stewart has said he feels that Kimi Raikkonen's potential return to Ferrari could lead to Fernando Alonso questioning his future with the Italian team.
Raikkonen is hotly tipped to be confirmed as Alonso's team-mate for the 2014 season in the near future, with the Spaniard having said that 'whatever decision the team makes will be good for me'
Should the deal be confirmed, it would see Raikkonen return to the team that carried him to the title in 2007 and would set up an intriguing battle between the champions for top spot in the Ferrari line-up.
Alonso has been very much number one since replacing Raikkonen back in 2009 and Stewart said that fact led him to feel that re-signing the Finn could have a negative effect on Alonso.
"I think there would be destabilising elements to it," he told BBC Sport
. "If Kimi went to Ferrari, would Alonso deliver as well as he has based on him being the chosen son, so to speak?
"It would be a very confusing element within that team for them to have Kimi and Alonso, who I doubt would really like to have Kimi there."
Stewart did admit however that a partnership of Alonso and Raikkonen would provide Ferrari with the perfect line-up to challenge for top honours.
"A team needs two drivers to be able to pick up world championship points," he said. "For Lotus, the points gain has almost exclusively been in the hands of Kimi Raikkonen, and that has been the same case at Ferrari with Fernando Alonso.
"However, Red Bull have had regular performances in the high points scale from both Sebastian Vettel and Mark Webber. That is why they are leading the championship.
"If you have two drivers picking the points up, you are going to win the constructors' championship."