 In singles, Pospisil won the ITF Flevoland Junior Championships in the Netherlands in February, the 25th All-Canadian ITF Junior Championships in April, and the Canadian U18 ITF World Ranking Event, the last one without losing more than four games in any set.Pospisil won two more European events that summer in doubles and was finalist three more times.He capped his summer off by reaching the 2007 U.S. Open boys' doubles final, partnering Grigor Dimitrov.