Thousands of football fans have clashed with riot police in Paris following the Champions Cup final this morning.What looked like thousands of supporters tried to get onto the field at Allianz Arena after Paris Saint-Germain's 5-0 win against Inter Milan saw it lift the trophy for the first time.Police lined up in front of the PSG end of the stadium at the final whistle but struggled to contain the fans for several minutes when they came down from the stands following the trophy presentation.