Boston Celtics show San Antonio Spurs a 3-1 deficit isn't insurmountable

The San Antonio Spurs entered Game 5 of the NBA Finals against the New York Knicks on Saturday night -- it is going on right now! -- trailing 3-1 in the best-of-seven series.

The Boston Celtics twice have come back from a 3-`1 deficit in the NBA playoffs to win a series, advance to the next round and go on to win the NBA title.

In 1968, the Celtics triumphed over the rival Los Angeles Lakers. In 1981, they defeated the Houston Rockets in the NBA Finals.