Lupul (knee) skated by himself prior to the Leafs' practice Monday, David Alter of the team's official site reports.Lupul's presence on the ice is a sign that he's moving in the right direction, but skating on his own means he's still got more hurdles to clear before returning to the lineup. Lupul did not take part in the team's practice when they showed up, which will likely be the next step towards his return.