The only time Croatian tennis players made it to the finals was at the first Umag tournament in 1990. Current Davis Cup coach Goran Prpic, who was better than then 19-year-old Goran Ivanisevic, won the tournament.

Two Croatian tennis greats bid farewell to professional playing in Umag. Bruno Oresar played his last ATP Tour match at the Croatia Open in 1991, while Goran Prpic bid farewell at the same place in 1996.

At the 1995 tournament, which Austria's Thomas Muster won for the third time, a very unusual competition took place in the accompanying program: a competition on who was the fastest to change the tires on a Formula One racing car.

Ivan Ljubicic recorded his first ATP Tour victory in Umag in 1996. He was 17 years old. Since then, he has marked more than 400 victories and has won 10 tournaments.

The ATP Croatia Open held in 1997 was unique in terms of the semi-finalists: all four players were Spaniards. In the end, the victory went to Felix Mantilla, who beat the first champion Sergio Bruguera in the final.

In Umag's first decade, triple winner Thomas Muster from Austria left the deepest mark. Hence he was declared an honorary citizen of Umag at the jubilee tenth tournament in 1999. Five years later, Spaniard Carlos Moya, a fivefold Umag winner, received the same acknowledgement.

Spaniards traditionally like clay courts, and Umag in particular. Thus there were a total of 11 of them at the tournament's main draw in 2000. But not even that was enough, because Chile's Marcello Rios won in the end.

Some of today's best players achieved their first victories at the tournament in Umag. The world's best tennis player Rafael Nadal thus played in the 2003 semi-finals as a 17-year-old, while today's second best tennis player in the world Novak Djokovic made it, also as a 17-year-old, for the first time from qualifications to the main tournament the following year.

The only Umag finals that was not completed, although the tournament did have a winner, took place in 2006. Novak Djokovic relinquished the final duel to Switzerland's Wawrinka due to exhaustion with a score of 6:6 in the first set. Prior to that, Wawrinka beat then 18-year-old Marin Cilic with a lot of difficulty in the second round.

Spaniard Carlos Moya made a record-breaking, fifth victory in Umag in 2007. His journey to the top was somehow made easier by the fact that three of the other champions already dropped out in the first round: Novak Djokovic was kicked out by fellow countryman Viktor Troicki, Nikolay Davydenko by Frenchman Gilles Simon, and Ivan Ljubicic by Romanian Andrej Pavel, who made it to the finals in the end.

The shortest Umag finals in terms of games (not including Novak Djokovic's surrender in the 2006 finals) was played in 2009. Russia's Nikolay Davydenko, who had not lost one set in the entire tournament, was in very good shape, while Spaniard Juan Carlos Ferrer was indisposed. The result: 6-3, 6-0.