The 1999 SEAT Open Luxembourg – Doubles was the doubles event of the ninth edition of the most prestigious women's tennis tournament held in Luxembourg. Elena Likhovtseva and Ai Sugiyama was the defending champion but she did not compete in this year.

Based on that paragraph can we conclude that this sentence is true?
Only 1/2 of Likhovtseva and Sugiyama competed both this year and last year.
Yes