Lotus owner Gerard Lopez believes the Enstone team will struggle to keep Romain Grosjean past this season.
Grosjean endured a difficult 2012 season, during which he was involved in several crashes, which ultimately led to him serving a one-race ban.
Since then, though, the Frenchman has been much more circumspect without losing the natural pace he has always had.
He has also risen to the challenge of being the team's lead driver this season after Kimi Raikkonen's departure for Ferrari.
Speaking to Sportinglife.com before this weekend's Monaco Grand Prix, Lopez admitted that, in all likelihood, he will face as fight to keep Grosjean's suitors at bay.
"We don't have the budget of some...
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