Opposite number Tony Adams bemoaned his side's lack of a finishing touch as striker Jermain Defoe spurned three chances.
Zola admitted: "That point means a lot to us - especially for the defenders' confidence."
But Pompey boss Adams insisted: "On another day Jermain Defoe would have had a hat-trick and we would have taken three points. If anything he tried too hard to score."
Adams, who reported that midfield ace Lassana Diarra had "badly sprained an ankle" causing him to come off after only 19 minutes, added: "We made the better chances in the second half and although it's good to get a point here I'd certainly be more pleased with all three.
"We've done well because we were without Sol Campbell and Niko Kranjcar and then lost Diarra, although it was an entire accident.
"The big shame is that we've got to send Lassana over to France for their friendly international next week. We are not allowed to pull him out but hopefully the French doctors will see the extent of the injury.
"I'm not happy he's got to get on a plane with it, though."