Qualified for the second round after a three-twin victorious game the day before (4/6, 6/1, 6/3) against Tim Smyczek, Kevin Anderson display not much energy to seal a Delray Beach ATP quarter-final berth.
The seeded No. 4 South African star spent less than five minutes on the court against Ivo Karlovic.
After having conceded the first set of the meeting, the world No. 56-ranked Croatian could no more continue the clash.
Anderson will then have to outperform the winner between lleyton Hewitt and Marinko Matosevic in the quarter final if he wants to play semis of the tourney.