 He then caused an upset in the second round defeating 12th seed Victor Hănescu 7–6(4), 6–4 before losing a close match to Denis Istomin in the third round 6–3, 3–6, 6–7(3).Reister won his first challenger title in Monza defeating Alessio Di Mauro in the final.He qualified for the 2011 BMW Open where he won his opening match over countryman Daniel Brands before losing to Nikolay Davydenko in a close match.