 Aged almost 33 Boschker moved to AFC Ajax, but had to settle with battling for being backup with the Amsterdam club, unable to dislodge youth product Maarten Stekelenburg.The following summer he returned to Twente, adding next to 200 more official appearances (in the 2008–09 campaign, he only missed five league contests for an eventual runner-up finish), and playing into his 40s.In 2009–10, Boschker played in all 34 games as Twente won the first league title in the club's history – he only conceded 23 goals, second-best in the competition.