"No one was more disappointed than me that I couldn't play because I love those tournaments," added the six-times grand slam winner, who has not played since retiring due to a knee injury in his Australian Open quarter-final against Andy Murray in January.
"Queen's is a big, important tournament played at a very nice, traditional club and it was an amazing feeling to win it in 2008," the 23-year-old said.
Argentine U.S. Open champion Juan Martin Del Potro has also been confirmed for the tournament in west London from June 7-13.
(Reporting by Tom Pilcher, Editing by Ed Osmond)
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