Dortmund defeated Mainz thanks to three headers in the first half.

Dortmund defeated Mainz thanks to three headers in the first half.

Borussia Dortmund triumphed over Mainz 4-0 on Friday, extending their unbeaten league streak to 15 matches and reducing the deficit to three points behind Bundesliga leaders Bayern Munich, who will face Werder Bremen on Saturday; the victory was supported by three headers in the first half and illustrated Dortmund's dominance in the league despite their poor European performance, coming into the match with five consecutive wins and overwhelming Mainz from the start, with Serhou Guirassy scoring a perfect header from a free kick after nine minutes to kick off the scoring, followed by Maximilian Beier doubling the lead six minutes later with a header from Ryerson's cross, and Guirassy capped off a near flawless first half with another header just before halftime, allowing Dortmund to ease up in the second half, yet still finding time for a fourth goal as Ramy Bensebaini scored from a corner nine minutes before the end.

On Friday, Borussia Dortmund secured a 4-0 victory against Mainz, which extended their unbeaten streak in the league to 15 games and cut the gap to three points behind Bayern Munich, who is set to play Werder Bremen on Saturday; the win was marked by three headers in the first half that showed Dortmund’s strength in the Bundesliga despite struggling in Europe, as they came into the match with five straight wins and dominated Mainz from the outset, with Serhou Guirassy heading in a goal from a free kick after nine minutes to set the tone, followed by another header from Maximilian Beier off Ryerson’s cross six minutes later, and just before halftime, Guirassy scored again with a header near the goal line, allowing Dortmund to relax in the second half, but they still added a fourth goal when Ramy Bensebaini scored from a corner kick nine minutes before the final whistle.