Complex sentence: After retiring from professional play in 1997, Griffiths is now coach to Marco Fu, Stephen Hendry and, formeley, the man who he lost to in his final World Championship match Mark Williams.
Split into simpler sentences: After retiring from professional play in 1997, Griffiths is now coach to Marco Fu and Stephen Hendry. He has also coached the man whom he lost to in his final World Championship match, Mark Williams.