Table:
text: Gastão Elias
Singles (7)
Singles (7)
Edition Round Date_ Against Surface Opponent Result_
2007 Davis Cup Europe/Africa Group I 1R 9–11 February 2007 Georgia Carpet George Khrikadze 6–3, 7–6 (7–5)
2007 Davis Cup Europe/Africa Group I GI PO 21–23 September 2007 Netherlands Hard Robin Haase 1–6, 1–6, 6–2, 7–5, 2–6
2008 Davis Cup Europe/Africa Group II 1R 11–13 April 2008 Tunisia Clay Walid Jallali 5–7, 2–6
2008 Davis Cup Europe/Africa Group II SF 19–21 September 2008 Ukraine Hard Sergiy Stakhovsky 4–6, 6–7 (5–7) , 4–6
2012 Davis Cup Europe/Africa Group I GI PO 14–16 September 2012 Slovakia Hard Martin Kližan 6–3, 2–6, 6–7 (4–7) , 2–6

Question: When did opponent George Khrikadze replace Gastão Elias in singles 7?

Question: What round was in the round in which the opponent was Sergiy Stakhovsky for Gastão Elias in the singles rounds 2008 (7)?