Alexander Overeem and Alexander Volkov have a chance to make a case for a heavyweight title shot in tonight’s main event at UFC Vegas 18.

At 40 years old, the No. 5 Overeem is 4-1-0 in his last five fights and the clock is ticking on the push to capture the elusive heavyweight title. Standing in his way is Volkov, 32, who can leapfrog into contention with a big win.

Kenai Andrews checks in with his thoughts on the main card.

MAIN CARD (8PM ET/5PM PT)

#10 CARLOS DIEGO FERREIRA (17-2-0) VS. #13 BENEIL DARIUSH (19-4-1)

UFC Vegas 18

Andrews: Ferreira is looking to even the score here and he has improved since their 2014 contest. But Dariush has a lot of momentum and I think his versatility helps him get another decision here.

Andrews Prediction: Beneil Dariush via UD

#13 CODY STAMANN (19-3-1) VS. ASKAR ASKAR (11-1-0)

UFC Vegas 18

Andrews: Askar is replacing Andre Ewell on short notice. Advantage Stamann.

Andrews Prediction: Cody Stamann via UD 

#5 ALEXANDRE PATOJA (22-5-0) VS. MANEL KAPE (15-4-0)

UFC Vegas 18

Andrews: Kape was a bit cheeky at the weigh-ins and he has some good Rizin wins on his resume. But he’s being welcomed to the octagon by a 6-3-0 UFC vet with good grappling to nullify his striking.

Andrews Prediction: Alexandre Patoja via UD 

MICHAEL JOHNSON (19-16-0) VS. CLAY GUIDA (35-20-0)

UFC Vegas 18

Andrews: Guida has lost three of his last four fights. His cardio is still there but seems to get a hit a lot more now. Have to go with Johnson to land enough to take the decision.

Andrews Prediction: Michael Johnson via UD

#2 CORY SANDHAGEN (13-2-0) VS. #4 FRANKIE EDGAR (24-8-1)

UFC Vegas 18

Andrews: Edgar still has some gas left in the tank, but I think Sandhagen works his way out of some early trouble and stops Edgar early with a strike.

Andrews Prediction: Cory Sandhagen via TKO

MAIN EVENT

#5 ALISTAIR OVEREEM (47-18-0, 1NC) VS. #6 ALEXANDER VOLKOV (32-8-0)

UFC Vegas 18

Andrews: Overeem has been here before. He methodically breaks down Volkov after being cautious initially.

Andrews Prediction: Alistair Overeem via UD

@kenaiandrews

UFC Vegas 18: Overeem vs. Volkov predictions