On 6 June 1999, Boca Juniors' Argentinian-record unbeaten streak ended at 40 with a 4-0 loss to Independiente.
Their streak started over a year earlier with a 2-4 win over Huracán in the fifteenth week of the 1998 Clausura and extended through that year's Apertura, which ended with Boca as champions on the back of thirteen wins and only six draws. It then carried over into the 1999 Clausura, as Boca won twelve and drew four of their first sixteen games.
With the streak standing at 40 and only three matches left in the season, they were away at Independiente. The two had played only once during Boca's unbeaten run, a 0-0 draw at the Bombanera the previous November. But it did not take long for the hosts to signal their intent, as striker José Luis Calderón (pictured) scored in the sixth minute.
Boca had a chance to equalize when the referee awarded them a penalty in the tenth minute, but Martín Palermo's shot was blocked by keeper Norberto Scoponi. Two minutes later, the referee awarded a penalty to Independiente, and Calderón converted to stretch the lead to 2-0.
Independiente striker Víctor López added a third in the 61st minute, then Calderón delivered the coup de grâce in the 75th, lobbing the ball over the keeper's head from the edge of the midfield circle to set the final margin at 4-0.
Although their streak ended at 40, Boca took some consolation by lifting the Clausura trophy.