"But that's not the case and Brendon is now competitive."
Toro Rosso reportedly wanted British Formula Two teen Lando Norris but his McLaren team, where he is the reserve driver, would only release him on loan.
Hartley needed a hospital check up after smashing into the barriers, when Stroll's Williams produced an oversteer. Hartley reported he would be fit for the French Grand Prix this weekend. He lies 18th in the drivers' championship, with a solitary point.