was directly relegated to the Druga HNL and the second-last team went in the relegation play-off, a two-legged tie against the second-placed team from the Druga HNL. This system was used for two seasons, followed by 1999–2000 Prva HNL where each club playing every other club three times for a total of 33 rounds. Next season featured a return of Championship and Relegation group system but without 50% points cutoff. This system was used until 2005–06 season, with a brief expansion to 16 teams in 2001–02 season. The 2006–07 season brought back a 33 rounds system previously used in 1999–2000 Prva HNL. In the 2009–10 season, the league was expanded to 16 teams. This lasted for three seasons, and in the 2012–13 Prva HNL season, the league was contested by 12 teams playing a total of 33 rounds. From the 2013–14 Prva HNL season, number of teams was reduced to ten. The league's main sponsor is T-Hrvatski Telekom, owned by the German telecommunications firm Deutsche Telekom. At the end of the 2014–15 season, the Croatian First League was ranked 17th in Europe. The champions of the 2015–16 Croatian First Football League will qualify for the second qualifying round of the UEFA Champions League, the runners-up will qualify for the second qualifying round of UEFA Europa League, while the third-placed team will qualify for the first qualifying round of UEFA Europa League. The winners of the 2015–16 Croatian Football Cup will qualify for the third qualifying round of UEFA Europa League. Clubs The following ten clubs compete in the 2022–23 Croatian Football League season, the 32nd season since the league's establishment. Five of the ten clubs currently competing in the Croatian top level also had spells in the Yugoslav First League played from 1945 to 1991 before Croatian clubs abandoned the competition (Dinamo Zagreb, Hajduk Split, Lokomotiva, Osijek, Rijeka). Four other Croatian clubs which had appeared in the top Yugoslav league (Cibalia, RNK Split, NK Zagreb and Trešnjevka) are currently playing in Croatian lower levels. As of 2022, only four of the 12 founding members of the Croatian league have never been relegated: Dinamo Zagreb, Hajduk Split, Osijek and Rijeka. † – One of the 12 founding members of the league in the inaugural 1992 season. ‡ – Appeared in all 31 seasons up to and including the current 2021–22 season. nb1 – Dinamo Zagreb tally includes four Yugoslav and 22