Canberra's Nick Kyrgios during his first round defeat at the hands of world No. 4 David Ferrer. Photo: Getty Images
World No.4 David Ferrer insists teenage sensation Nick Kyrgios can become a ''very great player'' despite his beating the Canberran in straight sets at the US Open on Tuesday morning.
A gallant Kyrgios was bundled out of his second grand slam when he lost to Ferrer 7-5, 6-3, 6-2 in New York.
The youngest player in the men's singles draw, Kyrgios was defiant until the end against an opponent ranked 211 places better than him.
Ferrer, a French Open finalist, is rated as one of the players capable of causing an upset against the top three - Novak Djokovic, Rafael Nadal and Andy Murray.
He overpowered Kyrgios in the closing stages of their first-round match, but the Spaniard was full of praise for the 18-year-old.
''Well, I think he's a very great player,'' Ferrer said.
''He has a really good serve, a very good forehand, and very good future. I like his game.''
Kyrgios surprised Ferrer earlier with some superb power serving.
He launched a 203km/h thunderbolt and pushed Ferrer to 7-5 in the opening set.
But experience and patience got the better of the former Daramalan College student as he fell behind and paid the price for 44 unforced errors.
Kyrgios described the match as both ''frustrating and enlightening''.
He is also set to rise up the rankings despite missing out on a spot in the second round, and he has already smashed his goal of breaking into the top 300 this year, starting the US Open ranked 215.
Kyrgios' attention will now turn to trying to earn a Davis Cup berth next month.
He will be part of a five-man team to play against Poland and he will travel to Munich in coming weeks to train alongside Lleyton Hewitt and Bernard Tomic.
Australia needs to beat Poland on clay to rejoin the Davis Cup World Group.