England centre Manu Tuilagi was called up by England only to then be ruled out on Tuesday with what Jones described as a "slight hamstring injury".
The England head coach added that Tuilagi will only be out for a couple of weeks as opposed to having picked up another long-term injury.
"We've been really pleased with his progress mate," said Jones.
"I think it's been very positive for him to come back from his Achilles and play with such vim and vigour,
"He's been outstanding, so it's just a small, little setback. And it will allow him to have a really good pre-season and we expect him back next year in very good condition.
"So very positive, very positive."
England A will face Scotland A at Leicester’s Welford Road ground on Sunday, with John Mitchell taking charge of the hosts.
England’s full squad will be in contention for the fixture, which precedes the July 4 and 10 full Tests against the USA and Canada.
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“Sunday, Monday, Jonny Gray.” – Top 5 Funniest British Rugby Chants
#5. 'You're not as good as Christmas!'
Saracens fans once chanted 'You're not as good as Christmas!' at Harlequins number 8 Nick Easter.
#4. 'Here's to you Jason Robinson.'
Here's to you Jason Robinson. Sale loves you more than you will know, woaaaahhhh. Here's to you Jason Robinson, Sale loves you more than you will know, woaaaahhh.
Sale Sharks fans to their legendary speedster Jason Robinson, to the tune of Simon and Garfunkel's Mrs Robinson.
#3. 'Sunday, Monday, Jonny Gray.'
"Sunday, Monday, Jonny Gray. Tuesday, Wednesday, Jonny Gray. Thursday, Friday, Jonny Gray. Saturday, Jonny Gray, rockin' all week with you!"
#2. 'Oh Maro Itoje’
A classic that's been used by Sarries, England and British & Irish Lions supporters.
#1. 'It's Joe Marler'
*Sung to the tune of 'That's Amore'
"When the scrums in reverse its not Furlong or Franks, it's Joe Marler.
"When he just doesn't care what you think of his hair, it's Joe Marler.
"When the refs getting cross cos he tossed Alun Wyn off. It's Joe Marler."
