The BBC clocked a record 2.3million unique viewers watching the England v Wales match online, doubling their previous digital figures
Overall on Thursday, 14.6million browsers across the globe logged on to the BBC Sport website to see coverage of the Euro 2016 tournament, which included Northern Ireland's 2-0 win against Ukraine.
Barbara Slater, Director of BBC Sport, said: "Our enhanced service, in addition to our first class TV and radio coverage, puts audiences at the very heart of the Euro 2016 action wherever they are, allowing them to follow the action however they wish."
The BBC has pioneered live digital event coverage from London 2012 Olympics to Glastonbury, and our record breaking figures highlight its increasing importance to audiences."
Coverage of the game on BBC One, meanwhile, peaked at a viewership of 9.3million - a 73% share of the television audience at that time.
280,000 football fans are also taking part in the BBC Sport Euro 2016 online predictor game. The game allows users to set up a personalised league with their friends as well as playing against BBC Sport presenters.
England face Slovakia in their final group stage on Monday. The match will be broadcast in the UK on ITV from 7:15pm.