14:38 CET - There are four Bundesliga matches kicking off at 15:30 CET, including Bayern Munich's trip to Werder Bremen.
14:20 CET - It's half-time between West Ham and Chelsea, with Enzo Maresca's men leading 2-0 after a dominant first-half showing.
You can follow the second half here.
13:53 CET - We're midway through the first half at the London Stadium and Chelsea are in cruise control thanks to a well-taken brace from Nicolas Jackson.
13:28 CET - Over in Spain, Real Sociedad will be looking to kickstart their LaLiga campaign when they travel to Real Valladolid at 14:00 CET.
You can follow that match here.
12:33 CET - We're less than an hour away from West Ham and Chelsea kicking off proceedings in the Premier League.
Here are the lineups for both sides, with Jadon Sancho making his first start for the Blues.
12:00 CET - Hello and welcome to our Football Tracker on what promises to be a thrilling day of action across Europe's top leagues!
First up, Chelsea travel to West Ham at 13:30 CET in the Premier League's opening fixture of the weekend before Bayern Munich, Liverpool, Manchester United and Real Madrid all take to the field later on.