Chicago Fire, who have scored a scant six goals and gained seven points from 10 matches, come to Rio Tinto hunting for a shift in form, while RSL will be looking to manage a packed squad with a US Open Cup match looming on Tuesday. But with the opposition an NASL side, rotation might be held until Tuesday, if it's needed at all.
Chris Schuler will miss out through a hand injury, while Olmes Garcia is unlikely after sitting out of training on Friday. Alvaro Saborio, though, could be in line for his first appearance in some time after missing out with a quad injury.
The midfield should basically pick itself, although Kreis will be wondering whether starting Sebastian Velasquez over Luis Gil could be in order, or whether another midfielder has shown well enough in training and reserves matches to make his way into contention.
With Schuler out, Carlos Salcedo could start his third career RSL match, having shown well last week against Chivas USA. Indeed, Kwame Watson-Siriboe was on the bench and plate in Monday's reserves match, suggesting Salcedo has done enough to win a place.
Should Saborio start, Joao Plata seems the obvious choice to start alongside him after forming a good early partnership, but Robbie Findley's return to fitness should render him an option. Sandoval is surely an option if Saborio doesn't start.
RSL will hope to continue their developing form and push on for their first three-match winning streak on the season. The Fire, one expects, will be content to simply not lose.