Despite his up-and-down start to 2017, Ma was given the chance to participate at the world championships held in Düsseldorf from late May to early June. Entering as the No. 1 seed, Ma progressed through the first four rounds without too much trouble, except for a tough six-game match against Sweden's Anton Källberg, who he had never played before. In the quarterfinals, he faced the host nation's Timo Boll, who had played an excellent tournament in front of his home crowd. He then quickly booked his place in the final by sweeping teammate Xu Xin, who was making his second appearance in a WTTC singles semi-final (he was also swept by Zhang Jike in 2013). The 2017 WTTC men's singles final did not disappoint. Ma and Fan faced off once again in a major competition, having played each other at least once in every major within the last two years except the Olympics. The win put him on par with Zhang Jike and Ma Lin for the most Grand Slam titles (5) and he became the first male with 10 major titles. This also marked his sixth consecutive major title won. Since 2015, he had won every major competition he had participated in.