Jose Mourinho and Pep Guardiola will not have to wait long to renew their rivalry with the first Manchester derby of next season to take place at Old Trafford on September 10. Mourinho, who replaced Louis van Gaal at United this summer, clashed regularly with Manuel Pellegrini's successor Guardiola while in Spain and they will go head-to-head immediately after the first international break of the season, with the return game at the Etihad on February 25, 2017.