Germany forward Havertz produced his best Chelsea showing yet by firing a fine brace in Saturday's 2-0 Premier League win over the Whites.
Blues boss Tuchel left Havertz out of the starting XI for Tuesday's 1-1 Champions League semi-final first leg draw at Real Madrid.
Kai Havertz scored both goals as Chelsea beat Fulham 2-0 at Stamford Bridge on SaturdayInsurance Loans Mortgage Attorney Credit Lawyer
But the 21-year-old Germany star offered the perfect riposte against Fulham, laying on a glittering display in the false nine role.
Havertz's two goals helped Chelsea cement fourth place, leaving Tuchel delighted with both the result and the talented young Germany star's pivotal performance.
'Still there is room for improvement but I am very happy,' said Tuchel
'He was decisive, he was involved with Timo Werner as a double striker and with Mason Mount and Hakim Ziyech as the four offensive guys, he was always involved in dangerous attacks and situations.
'For me it was an important individual example.
Thomas Tuchel praised Havertz's performance and attitude during the win over the Cottagers
'The players today who maybe had a tough decision on them last Tuesday, like Kai against Fulham, didn't play with the attitude that 'oh, now they need me' and 'I wanted more time in Madrid, why do they play me now only against Fulham'.
'This was absolutely not the case. He took his chance, he showed up, this is what we need all the time and especially in situations like this, you need guys who are fully committed. That means if you have a chance to show up,