DALLAS (AP) — Dallas Mavericks forward Kristaps Porzingis has undergone surgery to address a lateral meniscus injury in his right knee. The club says there is no timetable for a return. The 7-foot-3 Latvian injured the knee in the opener of a first-round playoff series against the Los Angeles Clippers in August. Porzingis played the next two games before being sidelined the remainder of a series won in six games by the Clippers. Dallas ended a three-year run of missing the playoffs behind the European pairing of Porzingis and 21-year-old sensation Luka Doncic.