Roger Federer shifts farewell at Laver Cup to doubles match

Roger Federer plans only a one-match appearance in doubles play Friday at the Laver Cup before making his retirement from tennis official.

Federer said Wednesday in London that Laver Cup officials agreed to allow him to appear in a match of his choosing, altering rules of the event to grant Federer's wish for the final sendoff.

"I know my limitations, and this is why I asked (European captain) Bjorn (Borg) if it's OK th