Swansea produced one of the shock results of the season as Virgil van Dijk's Premier League debut for Liverpool turned into a nightmare.
Alfie Mawson struck the 40th-minute winner for bottom club Swansea, pouncing on a poor Van Dijk clearance from a corner that Liverpool's £75million record signing possibly should not have conceded.
Liverpool came into this contest unbeaten in 18 games and on a high after ending the unbeaten record of league leaders Manchester City, so few saw this 1-0 defeat coming.
It was a frustrating night for Liverpool but they almost rescued a point in stoppage time when Roberto Firmino's header, from a Van Dijk cross, came back off a post.