#10 Chavo Guerrero vs CM Punk
CM Punk and Chavo Guerrero had a few feuds in WWE, the most memorable of them being their feud for the ECW title. Guerrero won the title for the first and only time in 2008 in a No Disqualification match.
The last time CM Punk and Chavo Guerrero faced each other in the ring was in 2008 on ECW in a four-way match which also included Tommy Dreamer and John Morrison.
Guerrero debuted on AEW last month as the manager of AEW's new signing, former WWE star Andrade.
#9 Billy Gunn vs. CM Punk
CM Punk's final singles match in WWE was against Billy Gunn, which came in January 2014 on RAW, just a few days before his Royal Rumble appearance - his final WWE appearance.
CM Punk had teamed up with Billy Gunn and Road Dogg a few times in January 2014, facing The Shield on RAW.
Billy Gunn joined AEW in 2019 as a coach and occasional wrestler. His son Austin Gunn is also part of AEW and the two are in a faction called The Gunn Club.