Former world No. 7 David Goffin admitted he had doubts after a challenging 2021 season. Last season was one of the most challenging of Goffin’s career as he was hampered by a knee injury and losing a lot. Goffin actually made a good start to the 2021 season as he won Montpellier and reached the semifinal in Antalya. Goffin won eight matches in the first two months of the 2021 season and then just six in the rest of the year. Goffin’s last win of the 2021 season came in Rome, where he defeated S …