If you are referring to Grand slam events only, that is a record likely to be held in women's tennis.
It would most likely be held by either Martina Navratilova, Margaret Smith/Court, or Steffi Graf.
the longest winning streak is 48 win-streak by Boston Collage
UCLA's 88 game win streak is the longest in mens basketball
The Washington Redskins' longest win streak is 10 games, which they achieved in the 1991 season. They went on to win the Super Bowl that year, beating the Buffalo Bills.
Longest winning streak: Pittsburgh Penguins with 17 straight wins Longest winning streak at home: Detroit Red Wings with 23
Bill Goldberg at 173
THE Wyoming Cattle