Tuchel takes pride in Chelsea character
The Blues have been on a remarkable run since the January appointment of Tuchel, losing only two of their 25 games in all competitions.
Chelsea have booked their place in both the FA Cup and Champions League finals, and victory over the Gunners can see them take a big leap towards claiming their place in the Premier League's top four.
With three games to go, the Blues sit third in the top-flight, six points ahead of fifth-placed West Ham and seven clear of Liverpool in sixth.
Chelsea clinched a vital victory over Manchester City, who they meet in the Champions League final later this month, on Saturday despite resting Thiago Silva, Ben Chilwell and Mason Mount.
And Tuchel believes that is testament to their character.
Speaking during his press conference ahead of Wednesday's showdown at Stamford Bridge, the German said: "We can rely on this squad for fighting spirit. We showed a lot of mentality in the last few games.
He added: "It's a tight schedule and a fantastic experience in the last three weeks, we have so much to fight for.
"There are a lot of targets to reach and it's exciting, demanding and sometimes tiring. But it's the best way to finish a season."
Tuchel confirmed Chelsea will be without injured pair Andreas Christensen and Mateo Kovacic for the visit of Arsenal.
The Blues are 7/10 for victory, with Arsenal 4/1 and the draw a 14/5 shot.