MUNICH, Germany: Welcomed with fanfare by Chelsea but then sacked just over a year later, Thomas Tuchel, who is returning to Germany as Bayern Munich’s new coach, is one of Europe’s most sought-after bosses but is not without controversy. The 49-year-old former Chelsea and Paris Saint-Germain coach has a reputation as a brilliant tactician who is not afraid to overhaul his side constantly. But he also has a streak of sackings behind him — with a bad-tempered exit at Borussia Dortmund in 2017 followed by an acrimonious parting from PSG in December 2020, and most recently in September, a tumultous departure from Chelsea.