Nagelsmann, whose sacking in March 2023 led to Tuchel's arrival, was tipped to return to Bayern, but has now extended his contract with Germany until 2026
World number one Murray swept aside Czech third seed Tomas Berdych 6-3, 6-4 to record his 28th consecutive victory and will be targeting a sixth title in succession on Saturday.
Djokovic, who was deposed as world number one by Murray in November and was beaten by the Scot in their last showdown -- in the title match of the 2016 season-ending ATP World Tour Finals - will be hoping to avoid the hiccups he faced against Spaniard Fernando Verdasco in Friday's semi-final.
The Serb saved five match points to stay alive before eventually subduing Verdasco 4-6, 7-6(7), 6-3.