Former German tennis ace Boris Becker underwent a secret operation to have nodules removed from his vocal cords.

The redhead TV personality has been instructed to rest and talk as little as possible, following the 45-minute operation.

His publicist says, "Yes, Boris Becker underwent surgery on his left vocal chords to have lumps removed. The operation was successful; Boris will rest his voice until Christmas so that next year he can fulfil his duties as usual."