1998 MFS Pro Tennis Championships
Date	August 24–30
Edition	70th
Category	World Series
Draw	32S / 16D
Prize money	$315,000
Surface	Hard / outdoor
Location	Boston, United States
Venue	Longwood Cricket Club
Champions
Singles
Michael Chang[1]
Doubles
Jacco Eltingh / Paul Haarhuis[2]
← 1997 · U.S. Pro Tennis Championships · 1999 →

The 1998 MFS Pro Tennis Championships, also known as the U.S. Pro Tennis Championships, was a men's tennis tournament played on outdoor hard courts at the Longwood Cricket Club in Boston, United States that was part of the World Series of the 1998 ATP Tour. It was the 70th edition of the tournament and was held from August 24 through August 30, 1998. Michael Chang won the singles title.

Michael Chang defeated Paul Haarhuis, 6–3, 6–4

• It was Chang's 1st singles title of the year and the 32nd of his career.

Jacco Eltingh / Paul Haarhuis defeated Chris Haggard / Jack Waite, 6–3, 6–2

• ITF tournament details