By Raven Saunt For Mailonline
Published: 09:50 BST, 4 August 2020 | Updated: 14:40 BST, 4 August 2020
Roger Federer joined two Italian schoolgirls for a game of tennis on the rooftop of an apartment building after they earned international fame with 12 million Twitter views with their lockdown match video.
The tennis champion, 38, took a private jet to surprise friends Vittoria Oliveri, 13, and Carola Pessina, 11, at their homes in Finale Ligure, Italy.
The girls, both avid tennis players, had been unable to visit the courts during Italy's tough lockdown in April.
But they had been instructed by their coach to keep practising so came up with the rooftop alternative, which soon went viral.
Federer, winner of 20 Grand Slam competitions, praised it as a 'wonderful idea' and wanted to get in on the action.
He added: 'The passion does not go away just because of a lockdown. I think that their video really resonated with a lot of people and with me too.'
Roger Federer, 38, joined two Italian schoolgirls for a game of