Audi's Mike Rockenfeller has ended an over two-year winless streak with a dominant race two triumph at the Moscow Raceway as Mattias Ekstrom regains the DTM championship lead with a third place finish.

The Team Phoenix driver's fourth career victory comes at the scene of his last previous triumph where he won the inaugural Russian DTM race back in 2013 while on his way to a maiden title in the series.

Despite winning by such a comfortable margin, Rockenfeller's robust defence was immediately called upon after the fast starting BMW of Bruno Spengler almost took the lead within the first few corners.

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The 2013 champion managed to hang onto the lead but as Spengler got edged off the optimum line the Canadian's BMW team mate Maxime Martin also sensed an opportunity to move up the order.

Martin was unable to make his move stick for second, which then allowed Team Rosberg's Jamie Green to launch his own attack on the pair around the outside of the opening sequence of corners - Green marginally benefited and jumped up to third to split the two BMW's.

That was the way the order remained until the pit-stop phase of the race.

A three-second gap back to Spengler allowed Rockenfeller to comfortably keep his lead but Green was the biggest loser of the pit-window after a slow 4.9 second stop dropped the Brit behind Martin and Team Abt's Mattias Ekstrom.

Rockenfeller and Ekstrom stayed out longer than their front-running rivals and made that advantage count with fresher tyres for the end of the race.

Any chance MTEK's Spengler had of catching Rockenfeller went out of the window when the long-running Mercedes of Lucas Auer, clutching onto second place, held up the chasing group led by the 2012 champion.

That also allowed Ekstrom to keep close tabs on Martin in third and on lap 34, the former double champion forced a vital move on the Belgian to steal the final step on the rostrum - giving the Swede a six-point lead in the title race ahead of HWA's Pascal Wehrlein.

Martin almost fell to fifth during the final corner of the last lap when Green dived up the inside of the RMG M4 but the Team Rosberg driver overshot the braking point and fell back down to fifth.

ART Grand Prix's Gary Paffett was the top Mercedes in sixth ahead of Marco Wittmann, Edoardo Mortara, Nico Muller and Pascal Wehrlein, who all completed the top ten.

Wehrlein endured a difficult afternoon in tenth after a slow stop from Green ultimately hampered the Mercedes F1 reserve driver's progress and fell back behind Mortara after passing the Italian just a few laps earlier.