The British driver has outscored his teammate at each of the past five grands prix.
The McLaren driver edged out fellow driver and title rival the Australian for the top spot in the closing stages of practice at the Brazilian Grand Prix.
Norris, who took the points lead from Piastri by just one point after his victory in the Mexican Grand Prix recently, topped the Australian by 0.023 seconds.
Until that point, Piastri had been the leading McLaren during the running before the sprint shootout due at 6:30 PM GMT.
Max Verstappen, the only other driver in the points battle, lying 36 points behind Norris, ended up in 17th place as his team ran a alternative strategy.
Verstappen's team-mate Yuki Tsunoda was the sole competitor to crash, if briefly, when he spun at the fourth corner soon after starting.
The Japanese lost control over the exit kerbs before rotating through the escape zone, and was lucky to get away with just a light touch of the fence.
Ferrari's the seven-time champion also had a spin, at the very end of the session, rotating twice through the quick descending Mergulho corner before the final corner on to the pit straight.
The veteran finished practice in 19th place, one place behind teammate Charles Leclerc.
Norris and Piastri were well clear of the remaining drivers, with the German's car third fastest, 0.619 seconds off Piastri's pace.
The Aston Martin of Fernando Alonso was fourth fastest, with Sauber's Gabriel Bortoleto in front of Mercedes' George Russell and Alpine's Pierre Gasly and Williams' Carlos Sainz.
A seasoned financial analyst with over a decade of experience in global markets and trading strategies.
News
News
News
News