Kleberson knows all about the difficulties of making a positive impression at Manchester United, and he has been trying to explain the struggles endured by Fred and Andreas Pereira.
Back in 2003, after seeing the midfielder become a World Cup winner a year earlier, the Red Devils invested £6.5 million ($8m) in the Brazil international.
But Sir Alex Ferguson saw little return on that investment, with Kleberson making just 30 appearances across two seasons at Old Trafford.
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Some 15 years on and United were back in the market for South American talent, with Fred acquired from Shakhtar Donetsk for £52.