Alberto Contador won a battle of the heavyweights against Chris Froome but before they sparred at the finish, two other riders were disqualified on stage 16 of the Vuelta a Espana for exchanging punches on the road.
Contador claimed his first stage win on the summit finish at La Farrapona to extend his overall lead, pulling away from Team Sky's Froome with one kilometre left and the rest of the field distanced.
Behind them the recriminations were still flying after Contador's Tinkoff-Saxo team-mate Ivan Rovny and Omega Pharma-Quick Step's Gianluca Brambilla had come to blows while part of the day's breakaway, leading to both riders being disqualified mid-stage by the commissaires.
The result sees Contador stretch his advantage in the general classification to one minute 36 seconds over Alejandro Valverde (Movistar), with Froome just three seconds further back in third place.
Ireland’s Dan Martin, riding for Garmin Sharp, finished seventh today, over a minute off the pace and is now sixth overall, while Team Sky’s Philip Deignan is 44th overall after finishing 37th.
A month ago, Contador was insisting he would not be fit to ride his home Grand Tour, but now he seems destined to win it.
The queen stage of this year's Vuelta exceeded all the billing as piles of drama were heaped between the four category one climbs of the 160.5 kilometre run from San Martin del Rey Aurelio.
A 13-man break had animated the stage, with Sky's Peter Kennaugh, Movistar's Adriano Malori and Tinkoff-Saxo's Rovny all making sure their teams were represented.
That meant Katusha's Joaquim Rodriguez was the only one of the main GC contenders without a team-mate up there, and he had yet bigger problems when Contador, Froome and Valverde jumped out from the pack on the first climb - an early taste of the fireworks to come.
Katusha reeled the trio in as the break went clear, enjoying a lead of more than eight minutes as they approached the second climb.
Despite that gap, the pace remained high, putting the squeeze on Omega Pharma-Quick Step's Rigoberto Uran, who saw his own GC hopes effectively ended as he struggled to keep pace with the pack, suffering the effects of illness.
The third climb saw Trek Factory's Fabian Cancellara break clear of the peloton, with the Swiss perhaps keen to put on a show of strength ahead of the world championships, but the stage was still only simmering.
It boiled over up the road, where an argument between Rovny and Brambilla in the break saw the pair come to blows in an extended exchange.
Shortly after, the commissaires car pulled alongside Brambilla and signalled his disqualification, but rather than climb off the visibly angry Italian waited for Rovny and remonstrated some more before eventually taking his leave.
Rovny raced on, but it was soon his turn to get the signal from the race officials.
