In an interview to NZZ, the former world No. 9 Marc Rosset commented on Roger Federer's shape and longevity. "In Madrid, he had not found his game yet, now he is improving. In Paris, he barely had close matches except for the one against Casper Ruud where he won a set in the tie-breaker.
He played in such a smart way in terms of tactics. Roger plays well and enjoys himself. In 2017 he did not want to take risks after his amazing comeback with the wins in Melbourne, Indian Wells and Miami. In 2018 he saw no reasons to change his schedule.
But when he played in 2018 in Stuttgart and Halle after a three-month break, he did not meet any top 20 player. Then he played the Wimbledon quarter-finals against Kevin Anderson, world No. 8 and he lost. Here he meets very strong opponents and he enters into a competition mood.
I think he lost the practice mood last year. He realized he had a too long break." On the relationship between Federer and Wawrinka, Rosset concluded: "In the Davis Cup team they got along well each other, like Jakob Hlasek and me before.
But each one has his life and camps, it has always been like this. They do not go on holidays together unlike some French professionals do."