Internacional closed to within two points of Campeonato Brasileiro leaders Cruzeiro by beating Gremio 2-0 on Sunday night.
Second-half goals from Charles Aranguiz and substitute Claudio Winck earned three points which lift Internacional within striking distance of the leaders, who drew 0-0 with Criciuma on Saturday, and ahead of Fluminense who were also held by Coritiba.
Indeed, Fluminense dropped to fourth as Sunday's results also saw Corinthians beat 10-man Santos to climb to third.
Santos had Alison sent off on the stroke of half-time but the visitors had to wait until the 84th minute before Gil scored the only goal.
Sao Paulo enjoyed a 3-1 win at home to Vitoria thanks to two goals from Alexandre Pato.
The former AC Milan star's first-half brace sandwiched an Alan Kardec strike, while Vitoria could only muster a Ricardo Kadu strike just before the break.
Atletico Mineiro and Atletico Paranaense both won to move eight points behind the summit.
Jesus Datolo's late goal earned Mineiro a 2-1 success against Palmeiras, after Diego Tardelli's opener had been cancelled out by Jose Henrique.
Paranaense were 2-0 winners against Botafogo, Cleo and Douglas Coutinho scoring in the final minute of either half.
Struggling Flamengo recorded only their third win of the season as Eduardo's 85th-minute goal saw off Sport Recife 1-0.
Figueirense beat Chapecoense by the same scoreline, Marquinhos on target with three minutes remaining.