Marquee recruit Virgil van Dijk's Premier League debut for Liverpool ended in defeat as Swansea won 1-0 at the Liberty Stadium on Monday.
Another defender, Alfie Mawson, scored the only goal of the game in the 40th minute as Liverpool slipped up in their quest to move level on points with third-placed Chelsea.
Try as the might, the Merseysiders couldn't break down a disciplined Swansea defence which held firm until the final minute of added-on time.
Liverpool striker Roberto Firmino managed to get free at the back post and thunder a headed effort towards goa,l but it only found the post.
Midfielder Adam Lallana leaped onto the rebound but his shot was deflected over the bar by Mawson, who scooped the Man of the Match for his efforts.
Swansea remain bottom, but they are now just three points behind fourth bottom Stoke.