There were shock wins for Bayonne and Bordeaux-Begles as the Top 14 returned for the 2019-20 season on Saturday.
Jeff Reine-Adelaide is set to join Lyon from Angers, unless Arsenal make an equivalent offer for their former player.
Benjamin Lecomte will compete for the gloves at Monaco next season after the goalkeeper signed a five-year deal with the Ligue 1 club.
Munster, Racing 92 and the Ospreys will take on holders Saracens in the pool stage of the 2019-20 European Champions Cup.
Nimes will be the visitors to the French capital when Paris Saint-Germain start their latest defence of the Ligue 1 title.
Lyon booked a Top 14 semi-final against Clermont after a hard-fought 21-16 victory over Montpellier on Saturday.
There will be a new Top 14 champion after Castres missed out on a top-six finish with a final-day defeat to Toulon.
Neither Bordeaux Begles nor Stade Francais can make the play-offs in the Top 14 after suffering painful defeats in the penultimate round.
Handre Pollard has agreed to join Top 14 heavyweights Montpellier and Morne Steyn will return to his homeland to replace the fly-half.
Grenoble look to be heading for a relegation play-off after losing at home to their nearest rivals Agen.