Levski Sofia clinched their 24th Bulgarian league title yesterday with a 2-1 win at relegation-threatened Botev Plovdiv.
With two matches to go, Levski have an unassailable eight-point lead over bitter city rivals CSKA who were beaten 1-0 at lowly Rodopa Smolyan.
CSKA had a seven-point lead at the top after the first half of the season but thanks to a string of fine performances Levski overtook them to capture their first league since 2002.
Levski top the 15-team national league with 67 points from 26 matches.
They will play in the second qualifying round of the Champions League next season. CSKA lie second on 59.
"We've been the most consistent team throughout the season and we deserve the title," said Levski coach Stanimir Stoilov whose side also enjoyed an excellent run in the UEFA Cup this season, reaching the quarter-finals.