Borg at his prime was like a machine, just the way he won at Roland Garros for 6 times (4 in a row 1978-79-80-81) especially in the 1978 and 1980 without losing a set and after 2 weeks he won wimbledon 5 times in a row:
1976-1977-1978-1979-1980.
He won Roland Garros and Wimbledon in the same years for three times in the rows:1978-79-80
Between Wimbledon and French Open he won 100 matches and 6 lost in his entire carrier:
(49 won and 2 lost at roland garros and 51 won and 4 lost at Wimbledon)
From 1977 to 1981 against Jimmy Connors he won 14 times against 2 lost.
Final Boca Raton 77(green clay)+ Connors 6/4 5/7 6/3
Final Wimbledon 77(grass)+Connors 3/6 6/1 6/2 5/7 6/4
Final Masters 78 (carpet)-Connors 6/4 1/6 6/4
Final Wimbledon 78 (grass)+Connors 6/2 6/2 6/3
Final Boca Raton 78 (green clay)+Connors 7/6 3/6 6/1
Final U.S.Open 78 (hard court)-Connors 6/4 6/2 6/2 (he was injured)
Final Boca Raton 79 (hard court)+Connors 6/2 6/3
Final Las Vegas 79 (hard court)+Connors 6/3 6/2
Semifinal Wimbledon 79 (grass)+Connors 6/2 6/3 6/2
Final Tokyo 79 (carpet)+Connors 6/2 6/2
Final Challenge Cup 79 (hard)+Connors 6/4 6/2 2/6 6/4
Round Robin Masters New York 80(carpet)+Connors 3/6 6/3 7/6
Round Robin Salisbury Wct 80 (carpet )+Connors 6/3 6/1
Semifinal Masters New York 81(carpet)+Connors 6/3 5/7 6/2
Semifinal Wimbledon 81 (grass)+Connors 0/6 4/6 6/3 6/0 6/4
Semifinal Us Open 81(hard)+Connors 6/2 7/5 6/4
He didn't play ever against Connors or McEnroe(probably the only player that can break into borg's game they were 7-7 in won-lost matches) on red clay and the damaged will have been way greater if either Connors and McEnroe made the finals in Paris.
The way he beat Vilas or Gerulaitis was sometimes speechless and they were number 3 or 4 in the world.
Borg won-lost against Gerulaitis was 18-0 and Gerulaitis was number 4 in 1977-78-79 top ten in 1980-81 and number 5 in 1982.
Gerulaitis was a very good player on clay with 2 victories at Rome 1977 1979,2 at Forest hills 1978 1980,Kitzbuhel 1979,Stuttgard 1980 and
Florence 1982
Some matches :
Final Montecarlo 79 (red clay)+Gerulaitis 6/1 6/2 6/3
Semifinal Roland Garros 79 (red clay)+gerulaitis 6/2 6/1 6/0
Semifinal Montecarlo 80 (red clay)+Gerulaitis 6/0 6/2
Final Roland Garros 80 (red clay) +Gerulaitis 6/4 6/1 6/2
In the Year 1977 Vilas was considered the best player in the World But every time he encontered Borg lost:
Final Nice 77(Red Clay) +Vilas 6/4 1/6 6/2 6/0
Semifinal Montecarlo 77(red Clay) +Vilas 6/2 6/3
and others matches on red clay:
Final roland garros 75 (red Clay)+ Vilas 6/2 6/3 6/4
Final roland Garros 78 (red Clay)+Vilas 6/1 6/1 6/3
Final Montecarlo 80(red Clay )+Vilas 6/1 6/0 6/2
Didn't go at Roland 1977 for preparing Wimbledon and Vilas won that year in Paris.
I think Borg was the only player that never lost a match in his carrier when was leading 2 set to zero and many comebacks when he was losing 2 set to zero and best five setter.
The players considered him "the best of the Year" from 1976 to 1980 and he didn't finished number 1 1977-78 because the atp computer sistem didn't count some tournaments.
I would like to see Borg against Sampras on red Clay with wooden rackets.
It's hard to make comparison to others Players on different "era" and Borg retired pratically very early in his carrier at 25 years old but his carrier was fenomenal anyway.