Krajinović made his first grass court final at the Queen's Club Championships by beating Jenson Brooksby, Sam Querrey, Ryan Peniston, and 7th seed Marin Čilić despite having no grass court wins prior to the event. He lost in the final to second seed, world No. 10, and defending champion, Matteo Berrettini. Despite losing in the final, his ranking improved from 48 to 31. Seeded 26th at Wimbledon, he was eliminated in the second round by eventual finalist Nick Kyrgios.
