Borussia Dortmund must have been watching the Premier League this past weekend with a smile on their faces.

They tested Manchester City in the first leg of their UEFA Champions League quarterfinals last week – had the referee not made mistakes, they would have at least drawn 2-2 – and will have been wondering what they can do to be that little bit better and get the win. Leeds United gave them the blueprint.

Newly promoted and currently 10th in the Premier League, Leeds beat Manchester City 2-1 and played the second half with only 10 men. City, the team who went 28 games unbeaten, now no longer look unstoppable.

Under manager Pep Guardiola, Manchester City have become the world's best paper tiger. On attack, they're fluid, dangerous and will overwhelm possession. But they can't play from weakness, they can't handle teams bringing the game to them and that's what Leeds did from the start.

Perhaps more importantly isn't what Leeds did this weekend but what Monaco, Liverpool, Tottenham Hotspur and Olympique Lyon have done since 2016. Manchester City have never progressed beyond the quarterfinals of the Champions League.

Dortmund manager Edin Terzic will have shown his team of young and hungry player this game, told them about how Guardiola overthinks big games and got them in the perfect mood to face Goliath at home in the Signal Iduna Park in Dortmund, Germany.

The issue is if they're able to do get things together and put that belief into action. On the weekend, Dortmund beat Stuttgart 3-2 with a hard-won victory. It included the first goal from talented British teenager Jude Bellingham but also showed how difficult they find it to close out a game.

Dortmund's defense has been an issue all season and, only one minute into the second half, things got worse for the German side as veteran Mats Hummels was subbed off with an injury. This will put more pressure on goals from wunderkind Erling Haaland and his regular strike partner Marco Reus.

It will be hard for Dortmund, and if this game took place immediately following their previous encounter, it probably would have seemed impossible, but if they use Marco Bielsa as an example, they can overturn their deficit and progress into the semifinals.