Table:
text: WTA Tier IV tournaments
Events
Events
Tournament Also_currently_known_as Citys Country Court_surface Tier_IV_in Years
Rome Internazionali BNL d`Italia Rome Italy Clay 1988 1
Zurich Zurich Open Zurich Switzerland Hard (i) 1988 1
Hamburg Rexona Cup Hamburg Germany Clay 1988–1989 2
New Jersey United Jersey Bank Classic Mahwah , NJ United States Hard 1988–1989 2
Newport Virginia Slims of Newport Newport , RI United States Clay 1988–1989 2
San Antonio Pilot Pen Tennis San Antonio , TX United States Hard 1988–1989 2
San Diego San Diego Open San Diego , CA United States Hard 1988–1989 2
Sydney Medibank International Sydney Sydney Australia Grass (1988) Hard (1989) 1988–1989 2

Question: Of the WTA Tier IV tournaments, which city hosts the tournament currently known as Medibank International Sydney?