By Tom Gott The agent of Barcelona striker Vitor Roque has accused former manager Xavi of lying about his plan for the teenager. Barca struck a deal to sign Roque last summer and initially planned to keep the striker in Brazil until the end of this past season, but the decision was made to bring the deal forwards to January. The 19-year-old ended up playing just 353 minutes under Xavi, prompting a furious reaction from Roque’s agent Andre Cury, who threatened to pursue a permanent exit unless things changed next season. In response, Xavi claimed he wanted to stick to the plan of keeping Roque …