 Ramba uchinyora ndima iyi - Klaasen akakunda Joe Cullen naMervyn King kuti vapfuurire kunhanho yechitatu yeWorld Championshipkokutanga kubva muna 2009. Akakundikana dart imwe paviri 18 kupedza 147 kupedzisa uye kukunda Phil Taylor 42, asati aenda 20 pasi mumakumbo mumutambo wekupedzisira. Taylor akarasikirwa nedareta rimwe kuti akunde mutambo uyu uye Klaasen akawana mukana wakazara nekukunda makumbo mana pa trot, achiputira ne11 dartter. Mumakwikwi ekupedzisira, Klaasen akanga ari 31 uye 43 shure kwaAlan Norris munhangemutange yevashanu. Akanga ari pasi nemakumbo maviri kusvika kune rimwe chete muchikamu chinotevera asi akabudisa makumbo gumi nerimwe ekudzokera shure kuti akunde uye akabva atora set yekupedzisira pasina kubvuma gumbo kuti aende kumasemi-fainari yePDC World Championship kekutanga, kwaakatarisana nemutambi anotonga Gary Anderson. Kukunda kwaKlaasen kwakaratidzawo kekutanga kuti mutambi akunda mutambo wavo unotevera mushure mekurova Taylor kunze kwePDC World Championship. Mumakwikwi ekupedzisira akarohwa 6-0 naAnderson, uyo akaita avhareji ye107. Klaasen akasvikawo kuma semi-fainari emutambo mukuru unotevera paakakunda Kyle Anderson 100 kuUK Open, asi akarasikirwa ne105 kuna Peter Wright. Akakundwa 106 naSteve Beaton mumutambo wokutanga weWorld Matchplay uye panguva imwechete yeWorld Grand Prix, 21 mumaseti naAdrian Lewis. 