Despite lacking fans to add edge to a rivalry made famous in the 1970s, both sides were unlucky not to score as they both hit the woodwork and tested their respective keepers..
Mendy also saved well from Raphinha’s effort to deny Leeds, who avoided a third straight defeat.
Kai Havertz wasted two good chances for the visitors as his Premier League goal drought continued, but he impressed overall in an advanced role.
While Tuchel will be disappointed his side did not claim victory to move about third-placed Leicester, his side were given a stern test.
And his run of 10 Premier League games unbeaten since the start of a new managers’ reign is second only to Nottingham Forest’s Frank Clark and Chelsea’s Maurizio Sarri.
Leeds, who have only one won of their last six games, were dealt a blow in the first half when they lost top scorer Patrick Bamford to injury in front of the watching England boss Gareth Southgate.