McEnroe's unreturned serves
And a list for McEnroe. Some of these matches we've listed upthread, but now the opponent's info is added.
1979 Davis Cup (grass)
McEnroe – 1st 54%, 1 ace, 35 unreturned, 35.7%
Alexander – 1st 66%, 4 aces, 39 unreturned, 30.5%
1979 Masters
Borg – 1st 63%, 4 aces, 21 unreturned, 17.5%
McEnroe – 1st 51%, 4 aces, 26 unreturned, 24.5%
1980 W
McEnroe – 1st 61%, 14 aces, 51 unreturned, 42.1%
Connors – 1st 67%, 1 aces, 33 unreturned, 22.8%
1980 W
Borg – 1st 62%, 9 aces, 57 unreturned, 29.1%
McEnroe – 1st 63%, 11 aces, 70 unreturned, 38.9%
1980 USO
McEnroe – 1st 58%, 7 aces, 71 unreturned, 39.4%
Borg – 1st 47%, 4 aces, 25 unreturned, 15.2%
1980 Masters
Borg – 1st 64%, 3 aces, 27 unreturned, 23.3%
McEnroe – 1st 57%, 5 aces, 36 unreturned, 33.6%
1981 W
McEnroe – 1st 61%, 8 aces, 57 unreturned, 34.8%
Borg – 1st 57%, 9 aces, 35 unreturned, 23.3%
1981 USO
McEnroe – 1st 54%, 10 aces, 35 unreturned, 30.7%
Borg – 1st 55%, 9 aces, 24 unreturned, 21.4%
1982 W
Connors – 1st 64%, 0 aces, 33 unreturned, 18.1%
McEnroe – 1st 54%, 20 aces, 55 unreturned, 34.8%
1982 Davis Cup (indoor clay)
McEnroe – 1st 56%, 16 aces, 37 unreturned, 21.6%
Noah – 1st 58%, 13 aces, 51 unreturned, 29.7%
1983 W
McEnroe – 1st 69%, 17 aces, 49 unreturned, 49.5%
Lendl – 1st 72%, 4 aces, 38 unreturned, 37.3%
1984 RG
Lendl – 1st 70%, 5 aces, 28 unreturned, 18.1%
McEnroe – 1st 43%, 7 aces, 35 unreturned, 22.6%
1984 W
McEnroe – 1st 73%, 9 aces, 26 unreturned, 47.3%
Connors – 1st 67%, 0 aces, 17 unreturned, 24.3%
1984 USO
McEnroe – 1st 60%, 18 aces, 51 unreturned, 32.5%
Connors – 1st 78%, 1 aces, 25 unreturned, 15.6%
1984 USO
McEnroe – 1st 62%, 8 aces, 33 unreturned, 45.2%
Lendl – 1st 64%, 3 aces, 15 unreturned, 18.1%
1985 RG
Wilander – 1st 72%, 1 aces, 23 unreturned, 18.1%
McEnroe – 1st 57%, 5 aces, 15 unreturned, 14.2%
1985 Canadian
McEnroe – 1st 60%, 6 aces, 31 unreturned, 45.6%
Lendl – 1st 54%, 6 aces, 27 unreturned, 39.1%
1985 USO
McEnroe – 1st 51%, 4 aces, 38 unreturned, 26.4%
Wilander – 1st 69%, 5 aces, 26 unreturned, 17.9%
1986 Atlanta (AT&T Challenge, won by Becker 3-6, 6-3, 7-5)
Becker – 1st 64%, 12 aces, 28 unreturned, 28.6%
McEnroe – 1st 63%, 13 aces, 33 unreturned, 41.3%
1987 Davis Cup
Becker – 1st 65%, 18 aces, 68 unreturned, 33.3%
McEnroe – 1st 63%, 16 aces, 82 unreturned, 34.2%
1987 USO
Lendl – 1st 63%, 8 aces, 29 unreturned, 38.7%
McEnroe – 1st 56%, 1 aces, 32 unreturned, 36.8%
1991 Philadelphia
Sampras – 1st 56%, 10 aces, 22 unreturned, 38.6%
McEnroe – 1st 49%, 0 aces, 20 unreturned, 33.9%
A few notes. For '81 Wimby final, I'm using published first serve percentages. And two of our matches are incomplete: 1979 Masters (missing 2 games) and 1982 Wimby (missing 6 points).