Complex sentence: He then signed for Birmingham City where he returned to haunt his old club on Tuesday, 12 December, 2000 by scoring in a 2--0 League Cup quarter-final victory over The Owls.
Split into simpler sentences: He then signed for Birmingham City where he returned to haunt his old club on Tuesday, 12 December, 2000. By scoring in a 2--0 League Cup quarter-final victory over The Owls.