 The midfielder scored another brace on 22 November 2009 in a 5–1 demolition of SC Heerenveen, taking his league tally to five goals in fourteen matches.In the final of KNVB Cup, De Zeeuw played in both legs and in the second leg, he set up a goal for Siem de Jong, as Ajax beat Feyernood 6–1 on aggregate.Though Ajax finished second behind Twente, De Zeeuw finished his season with a positive one, as he scored eleven goals in forty-seven appearance in all competitions.