Julian Simon has extended his lead at the top of the 125cc World Champi𝄹onship with h൲is fourth victory of the season after race leaders Andrea Iannone and Pol Espargaro crashed out at the final turn.

Espargaro, who took his first victory last Sunday at Indianapolis, had made a brilliant comeback to snatch๊ the lead from home hero Iannone with three laps to go.

The last lap began with Espargaro, Iannone and Simon in close formation, with Espargaro keeping his Derbi defensiv🍃e to leave Iannone without a chance to pass.

But heading into the final ⛎turn, Iannone dived for the inside of Espargaro, but lost the front wheel of his Ongetta Aprilia - taking them both out. As Simon cruised to victory, Espargaro's bike was sent cart-wheeling over a tyre barrier, befo🔴re the distraught young Spaniard confronted Iannone.

Some pushing and shoving followed before Iannone head-butted Espargaro, a move that had little effect given both were wearing crash helmets, but a๊ gesture which he could well come to regret once Race Direction have examined the footage.

The last turn drama promoted early leader Nicolas Terol (Jack & Jones 🥂Aprilia) to second and Simon's Aspar Aprilia team-mate Bradley Sm♏ith to third.

Simon, who began round twelve 52.5 points ahead of Terol, is now 57.5 points clear, with Smith five points further back w🌼ith four rounds to go.

Aprilia has now wrappe🍬d up the 2009 constructors' championship.

Race results - Misano:

1. Simon (Aprilia)
2. Terol (Aprilia) +0.573sec
3. Smith (Aprilia) +5.474sec
4. Marquez (KTM) +9.378sec
5. Cortese (Derbi) +9.665sec
6. Bradl (Aprilia) +11.755sec
7. Corsi (Aprilia) +23.044sec
8. Olive (Derbi) +26.936sec
9. Folger (Aprilia) +32.851sec
10. Webb (Aprilia) +34.439sec

Redding (Aprilia) DNF