"He's bounced back from a lot of things and there's no doubt that's exactly what he'll do now."
Hartley took to social media on Wednesday night to congratulate his Northampton team-mates George North and Courtney Lawes.
England have supplied 16 of the 41 players bound for New Zealand in Lions colours this summer, leaving Jones with significant holes to plug.
The Australian may choose to rest the likes of Mike Brown, Chris Robshaw, George Ford, Joe Launchbury and Tom Wood, giving them a precious breather in a packed calendar.
The Lions absentees and possible exclusion of senior players creates the opportunity to run the rule over some of England's highly successful under-20 graduates.
Also poised to tour Argentina are prolific try-scoring rugby league convert Denny Solomona, who qualifies for England on residency grounds, and uncapped back-row prospect Sam Underhill.