UConn’s women’s BB team lost to Stanford, ending its record 90-game winning streak. Its previous loss, two years ago, was also to Stanford.
UCLA has the men’s record, 88 games. Again, the same team bookended the streak. Notre Dame was the last team to beat UCLA before the streak and was the team that ended it.
And in football, Oklahoma has the longest major-college winning streak, 47 games. That streak began after a loss to Notre Dame and ended with a loss to Notre Dame.
So each streak ended and began with the same opponent.