Aston Villa midfielder Stiliyan Petrov and Bolton winger Martin Petrov are out of Bulgaria’s friendly at Hungary later this month.
Coach Lyuboslav Penev didn’t say why the pair will be missing for the February 29 game in Gyor when announcing his squad on Wednesday.
Penev failed to persuade Dimitar Berbatov to return to the squad. The Manchester United forward retired from international football in 2010, saying the national team is too stressful.
Five players from current Bulgarian league leader Ludogorets are in the 21-man squad, as is striker Valeri Bojinov, who has moved on loan to Lecce from Sporting Lisbon.