Were you on a cast for the same? if so continue it for 3 more weeks if its not grossly displaced. The acceptability of the fracture
displacement will depend on your Xrays. If you have no pain on walking at present, i suggest you to continue with the plaster. If otherwise, use crutches for walking till the pain subsides. Don't bear weight on your foot unless advised by your doctor.
As you are a sportsman, consult a physiotherapist before attending to normal activities and sports. Your restoration to sports should be gradual and guided, as suggested by the Physiotherapist.