Ronald Koeman will need time to rebuild if Lionel Messi and Luis Suarez leave Barcelona, says Rivaldo.
Former Netherlands boss Koeman was handed a two-year contract at Barca last week after being drafted in to replace Quique Setien in the Camp Nou hot seat.
The Spanish champions turned to a club legend to steady the ship in the wake of a humiliating 8-2 thrashing at the hands of Bayern Munich in the quarter-finals of the Champions League.
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The 2019-20 campaign marked Barca's first trophyless season in 12 years, and an inquest into the failings of both the first-team squad and the board has already begun.