Borussia Dortmund kick off Matchday 22 at home to Mainz, looking to reduce the gap at the top of the table. Dortmund remain on Bayern Munich’s tail after winning five straight league games. While Dortmund are keeping in touch, they have recently been winning games in chaotic fashion, with 3-2 victories over Heidenheim and St Pauli – the Bundesliga’s bottom two – in their previous two home outings.