"The Neymar deal is special for me because it means journalists are not looking at the price any more".
But Mourinho refused to label the seismic showdown as a make or break moment in the title race.
De Gea, it transpired, matched a Premier League record against Arsenal. We go match after match.More news: Pakistan calls in army as Islamabad protests turn violent
"We are second and are chasing the top of the table". We won four consecutive matches. "I'm happy but there is no message".
United were certainly indebted to their goalkeeper at the Emirates, and Mourinho was effusive in his praise after the game. "That's very hard to accept". Arsenal played in some period wonderful attacking football - creating difficulties for us.
After that David De Gea kept them at bay with a goalkeeping masterclass which included a Premier League record-equalling 14 saves, until Lacazette gave them hope.
"He made fantastic saves", Mourinho said.
Arsenal boss Arsene Wenger said De Gea was "absolutely outstanding".More news: Kris Jenner Compares Daughters' Pregnancies To A 'Faucet' That Won't Turn Off
"Last night I watched Napoli v Juventus on TV and we watched a top-class referee".
While you're here, check out the latest episode of #SportsJOElive where we had former Irish Rugby star Andrew Trimble alongside Down footballer Chrissy McKaigue and extreme adventurer Gavan Hennigan on the couch!
"You have to dictate from the start and show strength in duels from the back", Wenger said. And the 24-year-old enjoyed a successful first season back at Old Trafford as United tasted success in the Community Shield, EFL Cup and the Europa League.More news: Ivanka to lead American team for business summit in India
"We have produced an excellent performance but have conceded three goals and had at least 10 chances and were not efficient enough in the box, that is the reality".