The oddsmakers like Georges St-Pierre’s chances against Nate Diaz.

Then-UFC welterweight champion St-Pierre, who defeated Nate Diaz’s brother Nick Diaz via unanimous decision in 2013 at UFC 158, is now a favorite over the younger brother.

As reported on Tuesday, UFC President Dana White recently said the organization is targeting a fight between St-Pierre (26-2 MMA, 20-2 UFC) and Diaz (19-11 MMA, 14-9 UFC) for UFC 227, a pay-per-view event that takes place Aug. 4 at Staples Center in Los Angeles.

Now, the lines are opening for the possible matchup, and Bovada has listed St-Pierre as a -200 favorite over +160 underdog Diaz. (Note that the fights must happen in 2018, and depending on the sports book, the odds may have shifted slightly since their initial opening.)

As those current odds, a winning $100 bet on St-Pierre would result in a net profit of $50 (implied win probability of 67 percent) whereas as a winning bet on Diaz would score you $160 in profit (38 percent implied win probability).

St-Pierre closed as a small undersog in his most recent bout, when he returned from a four-year layoff to beat -120 favorite Michael Bisping at UFC 217. Diaz, meanwhile, was a +115 underdog to Conor McGregor in their second bout – despite winning their first meeting.

Earlier this month Diaz was reportedly was reportedly in “serious negotiations” for a UFC return. The polarizing fighter hasn’t fought since that majority-decision loss to McGregor in their rematch at UFC 202 in August 2016.

St-Pierre, meanwhile, has been sidelined with a medical ailment since beating Bisping at UFC 217 in November. He later vacated the belt, which is now held by Robert Whittaker, when his fighting future was uncertain due to health issues.

For more on UFC 227, check out the UFC Rumors section of the site.