3‑Nov‑1986 | Stockholm | Hard | R64 | 76 | 113 | Ben Testerman [USA] d. Lavalle | 6-4 6-1 | | | | | | | | | |
6‑Oct‑1986 | Scottsdale | Hard | R16 | 81 | 203 | (Q)Jim Grabb [USA] d. Lavalle | 6-1 6-3 | | | | | | | | | |
6‑Oct‑1986 | Scottsdale | Hard | R32 | 81 | 83 | Lavalle d. Glenn Michibata [CAN] | 6-4 4-6 6-2 | | | | | | | | | |
22‑Sep‑1986 | San Francisco | Carpet | R32 | 78 | 3 | (1)Stefan Edberg [SWE] d. Lavalle | 6-3 3-6 6-3 | | | | | | | | | |
15‑Sep‑1986 | Los Angeles | Hard | R32 | 66 | 36 | David Pate [USA] d. Lavalle | 4-6 6-3 6-2 | | | | | | | | | |
26‑Aug‑1986 | US Open | Hard | R64 | 70 | 41 | Ramesh Krishnan [IND] d. Lavalle | 6-2 6-4 6-3 | | | | | | | | | |
26‑Aug‑1986 | US Open | Hard | R128 | 70 | 100 | Lavalle d. Pat Cash [AUS] | 6-4 5-7 6-4 1-6 6-3 | | | | | | | | | |
18‑Aug‑1986 | Cincinnati | Hard | R32 | 69 | 53 | Jonas Svensson [SWE] d. Lavalle | 6-4 6-4 | | | | | | | | | |
18‑Aug‑1986 | Cincinnati | Hard | R64 | 69 | 48 | Lavalle d. Bud Schultz [USA] | 3-6 7-6 7-6 | | | | | | | | | |
11‑Aug‑1986 | Montreal / Toronto | Hard | R64 | 65 | 104 | Sammy Giammalva Jr [USA] d. Lavalle | 3-6 6-1 6-2 | | | | | | | | | |
18‑Jul‑1986 | Davis Cup WG QF: MEX vs USA | Clay | RR | | | Brad Gilbert [USA] d. Lavalle | 6-4 6-4 3-6 6-4 | | | | | | | | | |
18‑Jul‑1986 | Davis Cup WG QF: MEX vs USA | Clay | RR | | | Tim Mayotte [USA] d. Lavalle | 7-5 4-6 0-6 6-4 9-7 | | | | | | | | | |
23‑Jun‑1986 | Wimbledon | Grass | R128 | 61 | 1 | (1)Ivan Lendl [USA] d. Lavalle | 7-6 6-3 6-4 | | | | | | | | | |
9‑Jun‑1986 | Queen's Club | Grass | R64 | 62 | 242 | (Q)Christo Van Rensburg [RSA] d. Lavalle | 6-2 3-6 6-2 | | | | | | | | | |
26‑May‑1986 | Roland Garros | Clay | R128 | 55 | 128 | Simon Youl [AUS] d. Lavalle | 6-3 4-6 6-4 6-7 9-7 | | | | | | | | | |
12‑May‑1986 | Rome | Clay | R16 | 58 | 5 | (3)Boris Becker [GER] d. Lavalle | 6-1 6-3 | | | | | | | | | |
12‑May‑1986 | Rome | Clay | R32 | 58 | 45 | Lavalle d. Ramesh Krishnan [IND] | 6-2 6-2 | | | | | | | | | |
12‑May‑1986 | Rome | Clay | R64 | 58 | 204 | Lavalle d. (Q)Massimo Cierro [ITA] | 5-7 7-5 7-5 | | | | | | | | | |
5‑May‑1986 | Forest Hills | Clay | R16 | 61 | 41 | Guillermo Vilas [ARG] d. Lavalle | 6-2 6-2 | | | | | | | | | |
5‑May‑1986 | Forest Hills | Clay | R32 | 61 | 11 | Lavalle d. (6)Brad Gilbert [USA] | 1-6 6-4 6-3 | | | | | | | | | |
5‑May‑1986 | Forest Hills | Clay | R64 | 61 | 109 | Lavalle d. Damir Keretic [GER] | 6-2 6-3 | | | | | | | | | |
28‑Apr‑1986 | Indianapolis | Clay | R64 | 61 | 85 | Cassio Motta [BRA] d. Lavalle | 6-4 6-4 | | | | | | | | | |
24‑Mar‑1986 | Chicago | Carpet | R16 | 63 | 13 | (5)Paul Annacone [USA] d. Lavalle | 6-2 6-1 | | | | | | | | | |
24‑Mar‑1986 | Chicago | Carpet | R32 | 63 | 38 | Lavalle d. Mikael Pernfors [SWE] | 6-2 6-1 | | | | | | | | | |
17‑Mar‑1986 | Fort Myers | Hard | R32 | 51 | 36 | John Lloyd [GBR] d. Lavalle | 6-4 6-2 | | | | | | | | | |
7‑Mar‑1986 | Davis Cup WG R1: MEX vs FRG | Clay | RR | | | Boris Becker [GER] d. Lavalle | 6-3 6-2 6-4 | | | | | | | | | |
7‑Mar‑1986 | Davis Cup WG R1: MEX vs FRG | Clay | RR | | | Lavalle d. Michael Westphal [GER] | 8-10 3-6 6-3 6-4 6-3 | | | | | | | | | |
10‑Feb‑1986 | Boca West | Hard | R128 | 54 | 71 | Vincent Van Patten [USA] d. Lavalle | 7-6 6-3 | | | | | | | | | |
27‑Jan‑1986 | Philadelphia | Carpet | R16 | 87 | 33 | Jakob Hlasek [SUI] d. (WC)Lavalle | 6-3 6-3 | | | | | | | | | |
27‑Jan‑1986 | Philadelphia | Carpet | R32 | 87 | 5 | (WC)Lavalle d. (3)Stefan Edberg [SWE] | 1-6 6-4 7-5 | | | | | | | | | |
27‑Jan‑1986 | Philadelphia | Carpet | R64 | 87 | 40 | (WC)Lavalle d. Ramesh Krishnan [IND] | 5-7 7-6 7-6 | | | | | | | | | |