1. River Plate – 2011
In the wake of some serious financial crisis, the club slipped down into the second division in 2011. River’s poor form followed through the 2011 Clausura tournament, and as a result, River played the Promoción, a two-legged play-off against Belgrano de Córdoba, the fourth placed team of the 2010–11 Primera B Nacional. Belgrano won the first leg 2–0 at Córdoba, and held on for a 1–1 draw at El Monumental. With the defeat, River Plate was relegated to Nacional B for the first time in its history.