Table:
text: Manuela Maleeva
Singles (21–5)
Singles (21–5)
Edition Round Date_ Surface Opponent Result_
1983 World Group I R1 July 17, 1983 Clay Christiane Jolissaint 4–6, 6–4, 4–6
1983 World Group I PO July 19, 1983 Clay Angela Longo 6–1, 6–0
1983 World Group I PO July 21, 1983 Clay Olga Zaitseva 6–0, 6–3
1984 World Group I R1 July 15, 1984 Clay Jo Durie 6–4, 4–6, 6–4
1984 World Group I R2 July 16, 1984 Clay Natasha Reva 6–2, 6–0
1984 World Group I QF July 18, 1984 Clay Mima Jaušovec 3–6, 6–3, 6–1
1985 World Group I R1 October 6, 1985 Hard Larisa Savchenko 6–7 (3–7) , 6–4, 6–1

Question: What surface was used on July 15, 1984 singles by 21-5 Manuela Maleeva?

Question: What surface was used on Manuela Maleeva's singles 21–5 on July 17, 1983?