Olympic champion Alexander Zverev returns into Germany’s Davis Cup team for a qualifying tie next month against Switzerland. Zverev, who is back in action after a long-term ankle injury, leads a not yet complete squad announced on Wednesday by the German Tennis Federation (DTB) for the February 3-4 home tie in Trier. Oscar Otte, Jan-Lennard Struff and Tim Pütz were also picked by captain Michael Kohlmann, with the final player to be nominated at a later stage. Kohlmann said the return of Zverev would boost the team for which he last played in the 2022 qualifier against Brazil before a severe a…