Complex sentence: Mitchell retained his Swiss Open title in 2010 and also won the Center Parcs Masters and qualified for 2011 BDO World Darts Championship as the 15th seed but was beaten in the first round 3-0 by Dutch qualifier Jan Dekker.
Split into simpler sentences: Mitchell retained his Swiss Open title in 2010 and also won the Center Parcs Masters, and qualified for 2011 BDO World Darts Championship as the 15th seed. He was beaten in the first round 3-0 by Dutch qualifier Jan Dekker.