Gresini Honda pair Martin and Di Giannantonio and pre-race points leader Bezzecchi aboard the Prustel KTM broke away from the rest of the chasing pack early on, with a two-second buffer separating them from fourth place after just three laps.

A pattern quickly emerged, with Martin leading for the bulk of the running thanks to his prowess under braking at the first corner, San Donato - only to lose out at the end of the lap as his rivals were able to slipstream their way past coming out of Bucine and along the main straight.

Martin also had to contend with a piece of gravel punching a hole in his windscreen and a near miss with a hare that ran across the circuit.

The battle intensified as the final laps, as Martin and Di Giannantonio began to swap the lead more frequently, although Bezzecchi was able to briefly split the Gresini bikes at the start of the penultimate lap before Di Giannantonio forced his way back through at Casanova.

Bezzecchi remained close enough to draft into the lead at the start of the final lap, only to run wide at San Donato, setting up a two-way fight between Martin and Di Giannantonio.

Despite looking vulnerable at points on the last tour, Martin held on to win by just 0.019s after getting a strong exit out of Bucine, as Bezzecchi pipped Di Giannantonio for the runner-up spot by 0.024s.

A full 10 seconds back from the lead trio, a group of four riders broke away from what had been a 17-bike battle for fourth place at mid-distance.

Gabriel Rodrigo (RBA KTM) ultimately claimed the place narrowly ahead of Andrea Migno (Aspar KTM), Enea Bastianini (Leopard Honda) and Tony Arbolino (Snipers Honda).

Completing the top 10 were the lead three riders from the pack that encompassed almost the rest of the field: Lorenzo Dalla Porta (Leopard Honda), Niccolo Antonelli (SIC58 Honda) and wildcard rider Manuel Pagliani (Leopard Honda).

Aron Canet, third in the standings and only seven points behind Bezzecchi heading to Mugello, ran as high as fourth early on but finished a lowly 11th after being swallowed up by his pursuers.

Bezzecchi continues to lead the championship by three points over Martin, with Di Giannantonio eight back in third. Canet now trails by 22 points.

Race results:

Pos.	#	Rider	Bike	Time/Gap
1	88	Jorge Martin	Honda	39'20.810
2	12	Marco Bezzecchi	KTM	0.019
3	21	Fabio Di Giannantonio	Honda	0.043
4	19	Gabriel Rodrigo	KTM	10.948
5	16	Andrea Migno	KTM	11.083
6	33	Enea Bastianini	Honda	11.165
7	14	Tony Arbolino	Honda	11.194
8	48	Lorenzo Dalla Porta	Honda	14.567
9	23	Niccolo Antonelli	Honda	14.676
10	96	Manuel Pagliani	Honda	14.682
11	44	Aron Canet	Honda	14.693
12	17	John McPhee	KTM	14.720
13	40	Darryn Binder	KTM	14.733
14	75	Albert Arenas	KTM	14.770
15	42	Marcos Ramirez	KTM	15.237
16	71	Ayumu Sasaki	Honda	15.271
17	24	Tatsuki Suzuki	Honda	15.368
18	72	Alonso Lopez	Honda	15.631
19	65	Philipp Ottl	KTM	15.953
20	27	Kaito Toba	Honda	15.983
21	8	Nicolo Bulega	KTM	16.030
22	22	Kazuki Mazaki	KTM	22.492
23	84	Jakub Kornfeil	KTM	22.520
24	11	Livio Loi	KTM	50.691
25	41	Nakarin Atiratphuvapat	Honda	1'23.045
Ret	76	Makar Yurchenko	KTM	2 laps
Ret	5	Jaume Masia	KTM	4 laps
Ret	10	Dennis Foggia	KTM	14 laps
Ret	81	Stefano Nepa	KTM	15 laps
Ret	7	Adam Norrodin	Honda	18 laps