''It was not explained why I was dropped. I was shocked and disappointed when I was not in the Indian Test side for the England series,'' Zaheer told a website.
''To play cricket at the highest level and to give your best in all the matches is the most important thing and if there is any area of my game that needs improving, I am always open to listen to things. That's why I am here at Worcestershire, to gain fitness, grow as a cricketer, think about the game and grow as a bowler,'' he added.
Meanwhile, Zaheer's name was missing in the 15-member squad announced yesterday for the five-match ODI series in West Indies next month.
Zaheer said he was playing county cricket on the advice of Javagal Srinath and Wasim Akram and believed that it would help his Test form.
''A lot of senior bowlers like Wasim Akram and Javagal Srinath have been advising me to take a county season so I think this will help to groom me as a Test cricketer,'' Zaheer said.
The pacer said fatigue and long schedules did not worry him as he knew how to cope with the demands of international cricket.
''You learn to adapt to the situations depending on how much time off you have. You learn to recover and this will all be part of my learning process that I am aiming to achieve.'' ''When you play a lot of matches you must know how to recover and switch off from cricket and then switch on again on match days. This is one area of the game I want to work on in county cricket,'' he added.
Zaheer said he was sure that success at the county level would help him get the selectors nod for future tournaments including the World Cup.
''If I am doing well it will help me to reclaim my place back into the international side. So these performances here will definitely be counted as far as my selection goes,'' he hoped.
Speaking of competition within the team from youngsters like RP Singh and Munaf Patel, Zaheer said it was a good sign for Indian cricket.
''Competition is always good because it keeps you on your toes and motivates you to perform well. It is a good time for Indian cricket and is a good sign for me also because I have to really perform now to regain my place back in the India side and stay there for as long as I can,'' he said.