Originally posted by carthage
Kindly prove that he wasn't going "all out". Windu has no problems letting others know their faults in sparring matches like he held back against Quinlan Vos. Tiin is canonically one of the most skilled fighters produced by the Jedi order, and what? he lost to Dooku in his sparring matches and obviously that's reaching to compare him to Yoda. He openly admitted inferiority to Yoda.
Burden of proof is on you. Prove he was going all out.
He couldn't best Maul even with the backup of Aayla Secura (yeah, SOD Maul is slightly more skilled than in TPM), and Vader took multiple disabling blows and killed a replica of TPM Maul. That was before his prime in ROTJ.
In a duel that literally lasted one comic book panel. Lel. Not to mention his Mando's felt it necessary to intervene shortly into the battle.