"Ten years, it is a long time, but I don't think American tennis is as bad as people portray it to be, " Isner said.

CNN: March 4, 2013 -- Updated 1608 GMT (0008 HKT)

"Obviously the ump didn't think he challenged in time, but maybe because of the crowd noise the ump couldn't hear it or what not, " Isner said.

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"I took the court very confident, " Isner said, DavisCup.com reported.

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After his match against Dent had finished, Djokovic was asked about the Isner-Mahut contest and said all the players were watching it in the locker rooms.

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"I had a great week of practice and I was ready to go, " said the big-serving Isner, who will be the second seed at this week's U.S. Men's Clay Court Championship.

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