Table:
text: Vitas Gerulaitis
Singles: 55 (25–30)
Singles: 55 (25–30)
Outcome Date_ Championship Surface Opponent Score
Runner-up 1980 Pepsi Grand Slam , Boca Raton Clay Björn Borg 1–6, 7–5, 1–6
Winner 1980 WCT Tournament of Champions , US Clay John McEnroe 2–6, 6–2, 6–0
Runner-up 1980 French Open , Paris Clay Björn Borg 4–6, 1–6, 2–6
Winner 1980 Stuttgart Outdoor , Germany Clay Wojtek Fibak 6–2, 7–5, 6–2
Runner-up 1980 Sydney Indoor , Australia Hard (i) John McEnroe 3–6, 4–6
Winner 1980 Melbourne Indoor , Australia Carpet Peter McNamara 7–5, 6–3
Runner-up 1981 Monterrey WCT, Mexico Carpet Johan Kriek 6–7, 6–3, 6–7
Runner-up 1981 Melbourne Indoor, Australia Carpet Peter McNamara 6–4, 1–6, 5–5 retired
Winner 1981 Johannesburg , South Africa Hard Jeff Borowiak 6–4, 7–6, 6–1

Question: What is the earliest date that the Singles:55 (25–30) Championship Monterrey WCT, Mexico was for Vitas Gerulaitis?