I'm starting new series! #BestCenaFeuds
One feud per day since today

Day1. John Cena vs Randy Orton
Feud time: 2007-2009
Best Matches:
Bragging Rights 2009 - Iron Man match
Breaking Point 2009 - I Quit match
My Rating: 4.75/5

Day2. John Cena vs AJ Styles
Feud time: 2016-2017
Best Matches: Royal Rumble 2017, Summerslam2016
My Rating: 4.5/5

Day3. John Cena vs CM Punk
Feud time: 2011-2013
Best Matches:
Summerslam2011
Money in the Bank2011
Night of Champions 2012
RAW 25.02.2013
My Rating: 4.75/5

Day4. John Cena vs Brock Lesnar
Feud time: 2014-2015
Best Matches:
Night of Champions 2014
Royal Rumble 2015 (triple threat with Rollins)
My Rating: 4.5/5

Day5. John Cena vs Edge
Feud time: 2006
Best Matches: Unforgiven 2006 - TLC match
My Rating: 4.5/5

Day6. John Cena vs Seth Rollins
Feud time: 2015
Best matches:
Summerslam2015
Night of Champions 2015
My Rating: 4/5

Day7. John Cena vs The Rock
Feud time: 2012-2013
Best matches:
Wrestlemania 28
Wrestlemania 29
My Rating 4.75/5

I know they had segments in 2011 but it was more like build to feud, not feud inself

Day8. John Cena vs Roman Reigns
Feud time: 2017
Best matches: No Mercy 2017
My Rating: 4.5/5

Day9. John Cena vs Kane
Feud time: 2011-2012
Best Matches: Elimination Chamber 2012 - Ambulance match
My Rating: 4.5/5

Day10. John Cena vs Nexus
Feud time: 2010-2011
Best matches:
Summerslam 2010 - Team Cena vs Team Nexus
TLC 2010 - John Cena vs Wade Barret Chairs match
My Rating: 5/5

Day11. John Cena vs Kevin Owens
Feud time: 2015
Best matches:
Money in the Bank 2015
Battleground 2015
Elimination Chamber 2015
My Rating: 4.25/5

Day12. John Cena vs Batista
Feud time: 2010
Best matches:
Over the Limit 2010 - I Quit match
My Rating: 4/5

Day13. John Cena vs Great Khali
Feud time: 2007
Best matches:
One Night Stand 2007
My Rating: 4.25/5

Day14. John Cena vs The Miz
Feud time: 2011
Best matches: Over the Limit 2011
My Rating: 4.25/5

Day15. John Cena vs Randy Orton 2
Feud time: 2013-2014
Best matches:
TLC 2013 - TLC Unification match for WWE and WHC title
Royal Rumble 2014
My Rating: 4.5/5

Day16. John Cena vs Bray Wyatt
Feud time: 2014
Best matches:
WrestleMania30
Payback 2014 - Last Man Standing match
My Rating: 4.5/5

Day17. John Cena vs 'The Fiend' Bray Wyatt
Feud Time: 2020
Best matches:
WreetleMania 36 - Firefly Funhouse
My Rating: 4.25/5