Result: Borussia Dortmund 1-1 Mainz
Date: 16 January 2021
Venue: Signal-Iduna Park
Borussia Dortmund remain outside of the top three in the Bundesliga standings after dropping points against Mainz on home soil.
The home side got off to the perfect start as Haaland opened the scoring after just four minutes, but the strike was ruled out by the Video Assistant Referee (VAR).
Mainz went close at the other as Jonathan Burkardt failed fire past Roman Burki from close range after being picked out by Levin Oztunali.
Haaland looked pull Dortmund ahead after 28 minutes after getting on the end of Thomas Meunier's cross, but the Norwegian striker saw his close-range strike saved by Robin Zentner.
The Mainz shot-stopper was called upon four minutes later, this time producing a good stop to keep out Raphael Guerreiro's effort from distance.
Dortmund should have gone into the break in the lead, but the likes of Jude Bellingham and Jadon Sancho squandered big chances in the final five minutes.
The hosts were made to pay for their earlier misses in the second half when Oztunali found the back of the net for Mainz with an effort from distance on the hour mark.
However, Dortmund were back on level terms in the 73rd minute as Meunier got himself a rare goal with a neat finish into the bottom corner.
Meunier went on to win Dortmund a penalty three minutes after being brought down by Alexander Hack, but Marco Reus was unable to convert the spot-kick.
Dortmund threw everything forward in search of a winner, with Youssoufa Moukoko going closest with a header that sailed wide in the 90th minute, but 1-1 was how the encounter finished.
See below where Erling Haaland finished the year among the leading club goalscorers in 2020: