Losing 10+ differential in head to head matches, this is something not achieved by everyone, though some don't want it necessarily.
Initially this will be about past match ups, but there are some current ones that need updating.
Donkey punch would be good, but not appropriate. Turkey is a clear and concise for this category when being a pigeon isn't enough.
A classic one below, but Edberg won the ones that counted. He was 3-1 in Slams.
Boris Becker vs. Stefan Edberg
1984 Cologne Indoor Hardcourt R32 Edberg 6-4 6-4
1985 Philadelphia Indoor Carpet R32 Edberg 6-3 6-1
1985 Las Vegas Hardcourt R16 Becker 6-3 6-7 6-2
1985 Davis Cup Final, Carpet, F, Becker 6-3 3-6 7-5 8-6
1986 Dallas Indoor Carpet SF Becker 7-6 7-6 4-6 7-6
1986 Toronto Hardcourt F Becker 6-4 3-6 6-3
1986- Tokyo Indoor Carpet F Becker 7-6 6-1
1986 The Masters Indoor Carpet SF Becker 6-4 6-4
1987 Indian Wells Hardcourt F Becker 6-4 6-4 7-5
1987 Montreal Hardcourt SF Edberg 6-2 6-4
1987 Cincinnati Hardcourt F Edberg 6-4 6-1
1988 Dallas Indoor Carpet F Becker 6-4 1-6 7-5 6-2
1988 London / Queen's Club Grass F Becker 6-1 3-6 6-3
1988 Wimbledon Grass F Edberg 4-6 7-6 6-4 6-2
1988 The Masters Indoor Carpet RR Edberg 7-6 3-6 6-4
1988 Davis Cup Final, Clay, F Becker 6-3 6-1 6-4
1989 Roland Garros Clay SF Edberg 6-3 6-4 5-7 3-6 6-2
1989 Wimbledon Grass F Becker 6-0 7-6 6-4
1989 Paris Indoor Carpet F Becker 6-4 6-3 6-3
1989 The Masters Indoor Carpet RR Becker 6-1 6-4
1989 The Masters Indoor Carpet F Edberg 4-6 7-6 6-3 6-1
1989 Davis Cup Final, F, Carpet, Becker 6-2 6-2 6-4
1990 London / Queen's Club Grass SF Becker 6-4 6-4
1990 Wimbledon Grass F Edberg 6-2 6-2 3-6 3-6 6-4
1990 Sydney Indoor Hardcourt F Becker 7-6 6-4 6-4
1990 Stockholm Indoor Carpet F Becker 6-4 6-0 6-3
1990 Paris Indoor Carpet F Edberg 3-3 ret
1991 Stockholm Indoor Carpet F Becker 3-6 6-4 1-6 6-2 6-2
1992 Brussels Indoor Carpet SF Becker 4-6 6-4 6-2
1992 ATP Tour World Championship Indoor Carpet RR Becker 6-4 6-0
1993 Doha Hardcourt SF Becker 6-4 6-4
1994 ATP Tour World Championship Indoor Carpet RR Becker 6-7 6-4 7-5
1995 Basel Indoor Hardcourt QF Becker 6-4 3-6 6-3
1996 Doha Hardcourt R32 Becker 6-2 7-5
1996 London / Queen's Club Grass F Becker 6-4 7-6(3)
Becker leads 25-10
Initially this will be about past match ups, but there are some current ones that need updating.
Donkey punch would be good, but not appropriate. Turkey is a clear and concise for this category when being a pigeon isn't enough.
A classic one below, but Edberg won the ones that counted. He was 3-1 in Slams.
Boris Becker vs. Stefan Edberg
1984 Cologne Indoor Hardcourt R32 Edberg 6-4 6-4
1985 Philadelphia Indoor Carpet R32 Edberg 6-3 6-1
1985 Las Vegas Hardcourt R16 Becker 6-3 6-7 6-2
1985 Davis Cup Final, Carpet, F, Becker 6-3 3-6 7-5 8-6
1986 Dallas Indoor Carpet SF Becker 7-6 7-6 4-6 7-6
1986 Toronto Hardcourt F Becker 6-4 3-6 6-3
1986- Tokyo Indoor Carpet F Becker 7-6 6-1
1986 The Masters Indoor Carpet SF Becker 6-4 6-4
1987 Indian Wells Hardcourt F Becker 6-4 6-4 7-5
1987 Montreal Hardcourt SF Edberg 6-2 6-4
1987 Cincinnati Hardcourt F Edberg 6-4 6-1
1988 Dallas Indoor Carpet F Becker 6-4 1-6 7-5 6-2
1988 London / Queen's Club Grass F Becker 6-1 3-6 6-3
1988 Wimbledon Grass F Edberg 4-6 7-6 6-4 6-2
1988 The Masters Indoor Carpet RR Edberg 7-6 3-6 6-4
1988 Davis Cup Final, Clay, F Becker 6-3 6-1 6-4
1989 Roland Garros Clay SF Edberg 6-3 6-4 5-7 3-6 6-2
1989 Wimbledon Grass F Becker 6-0 7-6 6-4
1989 Paris Indoor Carpet F Becker 6-4 6-3 6-3
1989 The Masters Indoor Carpet RR Becker 6-1 6-4
1989 The Masters Indoor Carpet F Edberg 4-6 7-6 6-3 6-1
1989 Davis Cup Final, F, Carpet, Becker 6-2 6-2 6-4
1990 London / Queen's Club Grass SF Becker 6-4 6-4
1990 Wimbledon Grass F Edberg 6-2 6-2 3-6 3-6 6-4
1990 Sydney Indoor Hardcourt F Becker 7-6 6-4 6-4
1990 Stockholm Indoor Carpet F Becker 6-4 6-0 6-3
1990 Paris Indoor Carpet F Edberg 3-3 ret
1991 Stockholm Indoor Carpet F Becker 3-6 6-4 1-6 6-2 6-2
1992 Brussels Indoor Carpet SF Becker 4-6 6-4 6-2
1992 ATP Tour World Championship Indoor Carpet RR Becker 6-4 6-0
1993 Doha Hardcourt SF Becker 6-4 6-4
1994 ATP Tour World Championship Indoor Carpet RR Becker 6-7 6-4 7-5
1995 Basel Indoor Hardcourt QF Becker 6-4 3-6 6-3
1996 Doha Hardcourt R32 Becker 6-2 7-5
1996 London / Queen's Club Grass F Becker 6-4 7-6(3)
Becker leads 25-10