Sir Alex Ferguson wants 11 subs on the bench in finals
Berbatov played seven games and was an unused substitute three times during Manchester United's road to Wembley that season.
But the former Bulgaria international was dropped for the Champions League final with Barcelona, who came out on top as 3-1 winners.
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Sir Alex Ferguson says Dimitar Berbatov deserved a place on his bench in 2011 Champions League final
Berbatov, 36, had scored 21 goals in 42 appearances across all competitions that season - and Ferguson admits he deserved a place in his matchday squad.
Ferguson, 75, opted for strikers Wayne Rooney and Javier Hernandez in his starting XI, with Michael Owen as his option on the bench.
The Scot, who guided United to two Champions League crowns before retiring in 2013, has since called for clubs to be allowed 11 substitutes in finals.
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Dimitar Berbatov scored 21 goals for Manchester United in 2010/11 season
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"At Wembley, I [dropped] Dimitar Berbatov and he took it badly," Ferguson told MUTV. "He didn’t deserve it. No player deserves to be left out of the final.
"That’s why we try hard at these European seminars with the coaches to try to get 11 subs in the final."