Simplify the following text for a Grade 9 native English-speaking person.
Original: D'Ambrosio moved into single-seaters in 2003 , winning the Belgian Formula Renault ( 1.6 litre ) championship , driving for former Formula One driver and compatriot Thierry Boutsen 's team .
Simplified: D'Ambrosio moved into single-seaters in 2003 , and won the Belgian Formula Renault ( 1.6 litre ) championship .