10 days of training.
Unless we both have very different definitions of really good physical condition, nobody gets in good shape in 10 days.
It takes months of dedicated training to get in great shape.
At this time?. If a player wants to be great (or reach his full potential), its all time (include a year round physical aspect into that).
Wayne Rooney is currently lounging at a pool side in Vegas getting fat. Wayne Rooney ain’t great & never will be great (only in the deluded minds of his biggest fans at Old Trafford.