In the 1981 Volvo Masters who beat the winner of the 1975 Wimbledon men's double that partnered with Sandy Mayer?
1981 Volvo Masters – Singles:  Ivan Lendl won in the final 6–7(5), 2–6, 7–6(6), 6–2, 6–4 against Vitas Gerulaitis. Vitas Gerulaitis:  In 1975, Gerulaitis won the men's doubles title at Wimbledon, partnering with Sandy Mayer.
Ivan Lendl