User Moose Malloy from TW posted this:
I got confirmation from the atp:
Borg did have a streak of 41 in 1979-80 and he also had a mark in 1978
of 35 matches in a row not 49 because he had two walk overs in successive
tournaments. It was Borg's decision to withdraw in the middle of the
tournament not his opponent. A losing walk over ends a streak while a
winning walk over allows it to continue without counting the victory by
This was agreed in consultation with the ITF. Hope that helps!"
So it's Vilas after all.
I don't know where the "41" comes from.
49 consecutive matches in 1978
48 consecutive matches in 1979-80 (35 if we don't count 3 Invitational tournaments which are dubious)
During the first streak Borg gave two walkovers, during the second streak - one walkover.
Walkover isn't count neither as a win nor loss.
I think to prepare a solid stats you have to deliver all the details.
So for me Vilas holds the longest streak of winning matches whilst Borg the longest streak of matches without a defeat, it's some kind of distinction.
The same thing with McEnroe, you can say that he holds records:
42 - the longest winning streak to open a year
39 - the longest winning streak to open a season
When D'Joke finally loses, I will prepare a solid stats on my blog
I hope he wins at least "50" because I don't like Vilas's 46 circulating everywhere without explanation of Borg's case