Keizer and Meppelink also took part in the 2018 European Championships in July. Seeded 15th, they posted a loss to France's 31st-seeded Aline Chamereau and Alexandra Jupiter, but made it to the finals with victories over the second-seeded Czech team of Barbora Hermannová and Markéta Sluková, and the third-seeded Swiss team of Zoe and Anouk Vergé-Dépré. In the gold-medal match, Keizer and Meppelink defeated the fifth-seeded Nina Betschart and Tanja Huberli of Switzerland in straight sets for the second European Championship title of Keizer's career.