Complex sentence: His comeback to not only the pitch, but also starting eleven, was marked on Sunday, April 29 2007 against Athletic Bilbao where he assisted Ruud van Nistelrooy's first goal with a cross, and played a part in Ruud's second goal as well.
Split into simpler sentences: His comeback to not only the pitch, but also starting eleven, was marked on Sunday, April 29,2007, against Athletic Bilbao. He assisted Ruud van Nistelrooy's first goal with a cross, and played a part in van Nistelrooy's second goal as well.