The Țiriac Open is a professional men's tennis tournament played on outdoor clay courts. It was the successor event to the earlier Romanian International Championships (1930–1983). It is part of the ATP 250 tournaments of the ATP Tour. It was held annually in Bucharest, Romania, between 1993 and 2016 and revived in 2024. Its name is taken from Romania's famous tennis players Ion Țiriac and Ilie Năstase.