The Brussels tournament is also listed in the ATP Player's Guide, according to the ... Tom Okker French Wiki Page.
However I would be careful with the other matches. We don't know if they were officials or Invitational. Of course you can include invitational, it would even be a good idea, I think. But Lendl also has his share of 5-setter wins in those tournaments.
Is very difficult to know if these tournaments are "official" or "friendly". Now 5 setter matches are official and it's very easy
I have record of 19th century (with Sears, Renshaw, Lottie Dod,...)
Then, why I put these dubious records? Because if Federer win 40 5 setter matches someone (myself included) say that Nastase won 42; if Nadal win 7 Roland Garros, Decugis won 8.... I don't want records whith asterisks
Almost all records before Era Open are questionable but they are records. If Federer, Nadal, del Potro,.... beat a record of the 19th century would be news. So I put those records
Something else, thanks all for participation. if I forget to update any record or you find a new record count on your help to add
News: In this week I'll put these new records
Winning streak against Nº1
Total victories against Nº1
and you can try to answer this questions
What player won more numbers 1?
What player lost his first 3 games as number 1?
What player has losing streak as number 1?
Who was the worst ranked player to defeat a No. 1?
What number 1 never played a match as number 1?
In this week the answers (in ATP, no WTA)