Lendl was taken to five sets by unseeded Amos Mansdorf in the first round, and Kevin Curren subjected Wilander to the same treatment in round two.
Five-times champion and world number one Steffi Graf was beaten 7-5 7-6 in the first round of Wimbledon by unseeded American Lori McNeil in the biggest upset in 101 years of the women's singles tournament.
He had to rally from a two-sets-to-one deficit to win against the unseeded Bobo, a one-dimensional blaster.