B.________, a Turkish company, and A.________, a Swiss company, concluded a contract in 2012 that contained an arbitration clause in favor of an ad hoc arbitral tribunal with its seat in Wollerau/SZ.. A dispute arose and in June 2018, B.________ applied to the Höfe District Court for the appointment of Michael Lazopoulos as its party arbitrator. It also asked that court to appoint an arbitrator for A.________, as it had failed to put forward a name.