More than two million motorists have had an accident or near-miss while driving and listening to sport on the radio, a study has warned.
Football fans can get as emotional as their on-pitch heroes.
The Football Focus report has been published to coincide with the UEFA Champions League final in Rome.
Put together by academics from the University of Leicester, it warns that listening to live football matches on the radio whilst driving can be a dangerous distraction.
And it estimates that two million drivers have fallen foul of the emotions it can produce.
Tests carried out for the study showed casual listeners drove at a consistent pace throughout matches.
However, the driving style of football fans was found to vary considerably – sometimes erratically – as games progressed.
“It acts as a warning to more than a quarter of motorists, who are likely to listen to part or all of the match while driving, that they could be putting themselves and other road users at risk by doing so,” the report says.