NBC Sports Presents INDYCAR Grand Prix at The Glen & F1 Italian Grand Prix, 9/3

NBC Sports presents a motorsports tripleheader from the world's top racing series this Sunday all on NBCSN, beginning this Sunday at 7:30 a.m. ET with the iconic Formula One Italian Grand Prix from Monza. Coverage continues on NBCSN at 1:30 p.m. ET with the INDYCAR Grand Prix at the Glen, and concludes with the NASCAR Cup Series Race from Darlington Raceway, which will feature retro graphics and logos to pay homage to this weekend's throwback celebration at the track.

This week's coverage also includes NBCSN Overdrive, the network's Thursday night primetime motorsports block, highlighted by American Flat Track racing from Lima, Ohio, tonight at 10 p.m. ET.

Lead F1 and INDYCAR play-by-play commentator Leigh Diffey is slated to perform a rare broadcasting feat this Sunday. Diffey will call the F1 Italian Grand Prix on Sunday morning from NBC Sports Group's International Broadcast Center in Stamford, Conn., then take a flight to Watkins Glen in upstate New York in time to handle play-by-play duties for the INDYCAR Grand Prix at the Glen.