When open tennis arrived in 1968, Emerson joined the pro tour, and had many new battles with Laver.

He worked tirelessly toward the creation of open tennis, in which professionals and amateurs play together, which began in 1968.

The era of open tennis began in 1968 when both professionals and amateurs were allowed to compete together.

In the early years of open tennis, players had to win big titles in order to make big money.

Certainly, it was badly flawed before the advent of open tennis.

After open tennis came on the scene in 1968, the game developed in terms of popularity, attendance, prize money, and, particularly, television revenues.

This changed most significantly with the advent of open tennis, being in 1968.

He was an amateur in the first year of open tennis, when those who presided over the game finally lifted the barriers to professionals.

For only the second time in the 32 years of open tennis, no American man has reached the fourth round of a Grand Slam event.

But the advent of open tennis was a prerequisite to the tennis boom of the 1970's.