Wrexham manager Phil Parkinson said "there were a lot of positives" despite opening their pre-season USA tour with a 5-0 defeat to Chelsea.
The game in North Carolina was seen by 50,000 fans and a global TV audience.
Ian Maatsen scored twice in the first half for the Premier League side, before late goals from Conor Gallagher, Christopher Nkunku and Ben Chillwell
"The last couple of goals have probably put an untrue reflection on the balance of the game," said Parkinson.
"I thought we worked very hard and we had to because Chelsea have so many technical players and against a very good team I thought we had chances.