He lost to Wilander in the quarterfinals of the tournament in Sydney. At the Australian Open, Sampras upset twelfth-ranked Mayotte in the first round before losing to thirteenth-ranked Yannick Noah in the fourth round in four sets. His first professional singles title came in February at the Ebel U.S. Pro Indoor in Philadelphia, where he defeated sixth-ranked Andre Agassi, eighth-ranked Mayotte, and eighteenth-ranked Andrés Gómez in the final. This title elevated his ranking into the top 20 for the first time. Sampras finished 1990 at No. 5, having started the year ranked No. 61 just prior to the start of the Australian Open.