Kaiser Wilhelm 'abdicated' on November 9th 1918, seeking exile in Holland.
The German naval mutiny at Kiel took place on October 30 1918. The mutiny lead to other revolts in Germany, including ones at Hamburg, Bremen, Lubeck and Munich in the ensuing weeks.
The war bulletin read at the tennis match is a report of the Battle of Jutland. This took place in 1916. Although the British lost more ships than the Germans, it was a strategic victory for the Royal Navy as it maintained its numerical advantage over the German Navy. The German Navy retreated to harbour, leaving the Royal Navy in command of the area. The German Navy remained inactive and in harbour until the end of the war. Though not a total victory for the British, it has been argued that it was a strategic victory for them.