This looks like a tight, low-event game between two sides that are closer than the table makes them seem. The home team's position rests on finishing rather than on controlling matches, and the visitors bring a different, counter-based profile with a proven scorer up front. The most likely shape is a cautious opening and a result decided by one or two moments late on.
Velez Sarsfield sit fourth, but their numbers underneath are thin. Across seven league games with shot data they average under ten shots and about 0.8 expected goals for, against more than sixteen shots and about 1.5 expected goals against. They were outshot in six of those seven, including at home against Platense and Defensa. Their results come from a good finishing run and a back line that concedes volume but stays tight, which is why so many of their games end level: six draws in twelve league matches, five of them 1-1 or 2-2.
Gimnasia Mendoza are a different kind of team. They are roughly even on shots (about fourteen for, thirteen against), they keep a fair share of the ball, and Agustin Modica leads the league scoring with wide support from Lencioni, Cingolani and Vargas. Their record is strongly split: unbeaten at home, but only two wins in six away. Their away chance quality is modest too, so this is not a claim that they are the better side. Their last win, 1-0 over Newell's, was flattered by the score.
On the Velez side, Lanzini and Pellegrini are reported out, but neither was in the squad for the last match, so the attack that lost at Lanus is the one we will most likely see. The probable XI is almost identical, with Ronaldo Martinez as the only reliable finisher. On the Gimnasia side, the defensive absences are a mix of doubtful and conflicting reports, and Mondino is said to be fit enough to start. None of this changes the basic picture.
The flow I expect: a quiet first half, Velez looking to take an early lead through Martinez, and Gimnasia staying compact and trying to get Modica the ball in transition. Velez have repeatedly given back leads late, with equalisers in the 79th and 88th minutes and an own goal deep into stoppage time at Lanus, and Gimnasia have been in late-goal games of their own. A game that stays level, or one where Gimnasia get a counter goal, is a very live path.
That is why I'm siding with Gimnasia Mendoza not to lose this one. The market is paying for Velez's home record and league position, but the way they actually create chances, even at home, does not look like a clear favourite's profile.