Formula One to keep three day format with Friday tweaks

FILE PHOTO: Formula One - F1 - Chinese Grand Prix - Shanghai, China - 6/4/17 - Formula One Managing Director of Motorsports Ross Brawn walks at the Shanghai International Circuit ahead of the Chinese F1 Grand Prix. REUTERS/Aly Song

LONDON (Reuters) - Formula One is to stick with its three-day race format but with changes to the Friday schedule to cater for an expanding calendar, according to the sport's managing director for motorsport Ross Brawn.

Schedule changes have been debated by teams and stakeholders as part of measures to improve the show and cut costs while reducing the burden on staff who face travelling to an unprecedented 22 races from 2020.