Usman Khawaja criticised by Test greats for ‘poor management’ as toilet break triggers little-known cricket rule

Usman Khawaja has attracted criticism for missing the start of Australia’s batting innings due to spending time off the field for a toilet break and some stretching. 

Khawaja came off the field at the end of the 29th over of England’s innings and returned during the 33rd over, spending a total…