PSG broke the world transfer record to acquire Neymar from Barcelona last summer, and the Brazilian scored 28 times in 30 appearances for the French giants before sustaining a broken metatarsal in February.
Earlier this week, it was claimed that Madrid have held 'secret talks' with the 26-year-old over a potential return to Spain ahead of the 2018-19 campaign.
Zidane has said that talk of summer signings can wait until after the Champions League final, but the Frenchman insisted that Neymar 'would be compatible' with Cristiano Ronaldo when questioned on the topic.
"After the final we'll talk with the club about next year and what changes will be made. But I can't talk about anything like that [Neymar] at the moment," Zidane told reporters.
"Good player are always compatible. I remember one year they said I wasn't compatible to play with [Youri] Djorkaeff. We won the World Cup together. So good players can always play together.
"On the pitch there is a chemistry. I don't know if we are negotiating for Neymar. What's worrying us is what is going on at the moment. I haven't asked Neymar personally because I don't get involved in these things. We have to finish this season, the rest will come after."
Neymar scored 105 times in 186 games for Barcelona between 2013 and 2017.