City will face Tottenham again tomorrow and must win to keep Liverpool at bay.
The regular Dutch league season will be extended to May 15.
Ramsey is heading to Turin in the summer to join Juventus.
The Blues were sweating when Slavia mounted a second half comeback, but managed to hold on.
Napoli had 67% of possession but could not turn that into chances.
Liverpool defender Virgil van Dijk will work together with Lionel Messi come the Champions League semi-final against Barcelona.
"I was on the bench when I saw the goal that made it 5-3," Sissoko told French sports newspaper L'Equipe. "I was so upset that I returned directly to the dressing room.
Salah has learned to cope with the pressure that comes with his elevated profile.
Liverpool now march on to a clash with Lionel Messi's Barca, the first meeting of the clubs since a last-16 encounter in 2006/07 that the Reds won on away goals.
Even though two VAR decisions went against Guardiola's team, he still supports the use of VAR.
The result lifted Nantes up to 14th on 37 points, 12 above the relegation zone.
It was Mohamed Salah's first Champions League goal since December, and his first away from Anfield in the competition in 12 months.
There were four goals in the opening 11 minutes of the game and non-stop action right up until the dramatic finale.
Diego Costa has been accused of fraud totalling 1.1 million Euros related to taxes.
Juventus shares had plunged 15% today at the Milan stock exchange.
Yennaris played for England at youth level.
Juve spent considerably more than their opponents but were weren't able to best of the Dutch club.
Porto lost 5-0 at home to Liverpool a year ago when the clubs met in the last 16.
Guardiola is rightly regarded as the best manager of his generation after trophy-laden spells with Barcelona, Bayern Munich and now City.
Aaron Ramsey will end an 11-year association with the Gunners after agreeing to a jaw-dropping deal with Juventus reportedly worth US$515,000.