Manchester United  defender Nemanja Vidic  says that the international break comes at a good time for him, and that he will be working hard to improve while others are representing their countries.The defender retired from international football after Serbia failed to qualify for Euro 2012 and as a result will train with a small number of non-internationals at Carrington over the next two weeks.But the 31-year-old is looking forward to the quiet period because he can work on his game on the training ground without having to worry about preparing his body for matches."The international break is good for me," he told MUTV. "During the 10 days, I can work on my individual stuff like fitness and other technical things."It is also always good to have a few days for yourself. When you have lots of games, like we have recently, you just manage yourself until the next one and you don't work on yourself that much. "Sometimes it is nice to have these days to work on yourself."Vidic struggled with injury in the early part of the season but has since made a successful return to Sir Alex Ferguson's side, making 18 appearances in all competitions so far this term.