Dear Ganeshsir & Nilanjandaa,
Actually I was using 300 f2.8 with 2x II converter and by the time I saw them crossing the road in such light, it was too late for me to remove the converter so without having second thought I bent down and made few shots, so could not manage enough space around. In face, after making this image I felt so, that there should be more space around which could have enhanced the image further...
Very Best Regards