Frank Lampard has expressed his delight at notching a weekend hat-trick for Chelsea and silencing those who have begun to doubt him.[LNB] The England midfielder has not always been a first-choice pick for club and country this season, with more time spent on the bench than he is used to.[LNB]He has, however, offered the perfect response to those suggesting his powers are on the wane.[LNB]Many have been quick to write off his international career, while hinting that the clock is ticking on his days at Stamford Bridge.[LNB]Lampard has refused to read too much into such reports and has remained fully focused on his football.[LNB]He has seen those efforts rewarded in style, with three goals against Bolton on Sunday helping Chelsea to a 5-1 victory at the Reebok Stadium.[LNB]That treble came on the back of a midweek strike against Valencia in the Champions League and Lampard hopes he has proved a point to his critics.[LNB]He said: "There's only one way to answer the critics. Today was the day when it all came together for me and I'm pleased.[LNB]"It was one of the most special hat-tricks I have had after the time I've had. I'm hungry to play. I'm not a happy boy when I'm not playing. I want to earn my money.[LNB]"But I also have respect for the manager and players in the squad. I'll always work hard to play for this club."[LNB]Lampard's heroics at the Reebok were not lost on England boss Fabio Capello, as he has included the 33-year-old in his squad for Friday's crucial Euro 2012 qualifier against Montenegro.[LNB]Chelsea boss Andre Villas-Boas is not surprised to see Lampard get the nod, with the Portuguese tactician of the opinion that the midfielder is back to his best.[LNB]He said: "He arrived with perfect timing in the box as he has done in the past. His talent has never been in question."