Marc Marquez reduced Stefan Bradl's Moto2 championship lead to a mere six points by taking his seventh win of the season at Aragon, as a tyre problem for Bradl dropped him to eighth.

The title rivals had made a spectacular start to the race, launching into an immediate three-way battle with Scott Redding that included the lead being exchanged repeatedly on the first lap alone.

That level of frenetic dicing continued for the first two thirds of the race, with Andrea Iannone, Simone Corsi and Alex de Angelis joining in, and all taking a turn in the lead, as Aleix Espargaro, Julian Simon and Mike di Meglio started tagging onto the back of the train too.

Marquez kept fighting to the front of the pack but failing to break away - at one stage running wide off the track just as he seemed set to escape.

The crunch moment came on lap 14, when Speed Master rider Iannone made a big move on Marquez at the first corner, slid slightly off course, and narrowly avoided taking the race leader out while also breaking up the pack a little.

While Iannone accelerated back on in third place, Marquez got some clear air at last and started cruising away, going on to win by 2.466 seconds.

Iannone reclaimed second, with Corsi (Ioda) and de Angelis (JIR) chasing him home.

The rest of the erstwhile lead group became detached - and grew into an even bigger gaggle, with just 3.1s covering fifth to 17th places at the flag.

Bradl began to suffer a severe tyre problem with his Kiefer Kalex and drifted down the order to finish eighth, behind Espargaro, Bradley Smith and Thomas Luthi. Early leader Redding fell right back to 15th.

Thanks to Autosport...