Monster Energy Kawasaki’s Eli Tomac proved he has become a legitimate title contender after winning his second 2017 Monster Energy AMA Supercross main event in a row at Oakland’s O.co Coliseum.

After picking up a breakthrough victory last week in Phoenix, Tomac came from behind – as far back as eighth on lap one – and seized the lead on lap 17 of 21 completed.

From there he sprinted away to a sizable 10.206s win ahead of longtime leader and red plate holder Ryan Dungey (Red Bull KTM), while top qualifier and heat winner Cooper Webb (Monster Energy/Yamalube/Chaparral/Yamaha Financial Services/Yamaha) was third.

A strong-starting Jason Anderson (Rockstar Energy Husqvarna) finished fourth, getting the better of Cole Seely (Team Honda HRC), who rounded out the top five – the rut-filled track notoriously challenging the most elite riders in the sport.

Australia’s Chad Reed (Monster Energy/Yamalube/Chaparral/Yamaha Financial Services/Yamaha) claimed eighth after crossing the line a lowly 16th on the opening lap. Dungey now leads Tomac by 17 points, while Reed’s eighth.

In the Western Regional 250SX final Justin Hill made it three wins on the trot for Monster Energy/Pro Circuit/Kawasaki, despite crashing in the latter stages, and took over the points lead by one in the process.

Hill held off Martin Davalos (Rocktar Energy Husqvarna) and Shane McElrath (Troy Lee Designs/Red Bull/KTM), while Dan Reardon (Yamalube/Star Racing/Yamaha) had to recover from being caught up in an opening lap crash for 12th.

The series will now head to Arlington, Texas, next Saturday for round six of the 2017 Monster Energy AMA Supercross Championship on 11 February.