Liverpool manager Rafa Benitez has hit back at his critics after the Reds were dumped out of the FA Cup by Barnsley. <p> The Tykes, who sit mid-table in the Championship, recorded a huge upset as they came from behind to knock Liverpool out 2-1 at Anfield. <p> And the defeat adds increasing pressure on under-fire Benitez as Liverpool can now only realistically target silverware in this season's UEFA Champions League. <p> But Benitez, who took over at Anfield in 2004, has defended his record at Liverpool after guiding the Merseyside outfit to two Champions League finals in the past three years - including winning the competition in 2005. <p> Record <p> Benitez has also steered Liverpool to success in the 2006 FA Cup and Community Shield, alongside the 2005 European Super Cup, and the Spaniard believes that record deserves respect. <p> "If you analyse the last few years since I came to the club we have won four trophies and been in seven finals, including two in the Champions League," Benitez said in The People. <p> "How many other managers have done the same in their first three or four years at the club? People can talk about being successful but nobody is winning trophies every year. <p> "To do that is really difficult so I think we are in a really good position with a very young squad, so I have a lot of confidence in the team for the future." <p> Benitez's relationship with Liverpool's American owners George Gillett and Tom Hicks has also been questioned and his future at the club was cast into doubt after the duo met Jurgen Klinsmann, who is set to take over at Bayern Munich in the summer, earlier in the season. <p> "When you are trying to work hard and do your job it is hard to accept the criticism that is always following me," Benitez added. "And, yes, it is a big surprise to see another manager in the background." <p> Benitez, though, is confident Liverpool stand a good chance of progressing in the Champions League when they meet Italian champions Internazionale in the last 16 on Tuesday. <p> "It could be important to us to progress in Europe because that would give us more confidence, particularly if we beat a team like Inter," Benitez continued. <p> "It's not impossible. We have done it before and we could do it again - why not?"