Jaissle was the surprise choice to replace Eddie Howe earlier in August and the German faces a major struggle to win over his doubters.
Just 38 and with no experience of a top European league on his CV, former Red Bull Salzburg and Al-Ahli boss Jaissle has been plunged into the deep end at St James' Park.
Howe left Newcastle by mutual consent after a turbulent 12 months marred by the sales of several star players.
After ending the club's 56-year…