There are some things wrong about this match up but value clearly in away side imo.
Universitario for quite some time have been lacking offensive power and players are geting really nervous opotch after some bad results lately. 3 red cards picked up in last 3 games and some suspensions with that.
Truth to be told, San Martin ain't shining as well. Nevertheless they have 4 players who are part of Peru's national team, along with Perea upfront, parthnering with Montano. So we are talking about quality difference here. Along with that their coach Uribe is someone who can bring team back from the ashes and tomorrow one point is the least theycan take.
Taking a look back in history we will see that San Martin failed to win in last 8 mutual games but were quite unlucky to leave without a victory on some occasions. Usually, they were taking the lead but evenetually dropped points. However, against Universitario with nervous players when things don't work as expected I think this streak could be broken in less than 48 hours. Fair line should be +0.25 here