Lando Norris wins Monaco Grand Prix
Norris' victory cut Piastri's lead at the head of the championship to three points, with Verstappen a further 22 behind in third.
McLaren's Lando Norris won the Monaco Grand Prix for the first time with a copybook drive, controlling the race from start to finish.
Norris navigated the potential pitfalls of a new rule requiring drivers to use three sets of tyres during the race to lead throughout and beat Ferrari's Charles Leclerc for the Briton's second victory of the season.
McLaren's Oscar Piastri took third, well clear of Red Bull's Max Verstappen, with Ferrari's Lewis Hamilton a distant fifth.
Norris' victory cut Piastri's lead at the head of the championship to three points, with Verstappen a further 22 behind in third.
The race began amid uncertainty as to how the new rule imposed to increase jeopardy would play out, and amid predictions of wild strategies and potential chaos.
As it turned out, it was relatively straightforward for the front-runners, largely because the only intervention by the safety car was an early virtual one after a crash for Sauber's Gabriel Bortoleto on the first lap.
Norris converted his excellent pole position - his first since the season-opener in Australia - into a lead at the first corner as the top 10 moved off in grid order.
Norris negotiated both pit-stop periods as he, Leclerc and Piastri all followed the same strategy of starting on the medium tyre followed by two stints on the hard, splitting the race more or less into thirds.
