Table:
text: Wayne Ferreira
Doubles: 24 (11–13)
Doubles: 24 (11–13)
Outcome Date_ Tournament Surface Partner Opponents Score
Winner 7 January 1991 Adelaide , Australia Hard Stefan Kruger Paul Haarhuis Mark Koevermans 6–4, 4–6, 6–4
Winner 25 March 1991 Miami , US Hard Piet Norval Ken Flach Robert Seguso 5–7, 7–6, 6–2
Winner 13 January 1992 Auckland , New Zealand Hard Jim Grabb Grant Connell Glenn Michibata 6–4, 6–3
Runner-up 6 April 1992 Johannesburg , South Africa Hard Piet Norval Pieter Aldrich Danie Visser 4–6, 4–6
Runner-up 18 May 1992 Rome , Italy Clay Mark Kratzmann Jakob Hlasek Marc Rosset 4–6, 6–3, 1–6

Question: What is tournament if the date is "April 6, 1992" in Wayne Ferreira's Doubles: 24 (11–13) results?