Sachin Tendulkar has a stiff back, but there was no uncertainty over his trip to Pakistan, as the problem was very minor.“Sachin (Tendulkar) has a stiff back. And so he was asked to take it easy yesterday. And he did not come out to field in the later half of the day today,” Indian team physiotherapist Andrew Leipus said here.Leipus, however, said that the batting genius was an absolute certainty for the coming tour to Pakistan. “The problem is indeed very minor. These things are part and parcel of cricket.”Tendulkar has been undergoing physiotherapy under the guidance of the physio and has been advised to take rays as also follow some exercise routines.Tendulkar’s discomfort showed today as he put up a dismal show with the bat, being dismissed three times in succession on miserly scores of 0, 0 and 4.Tendulkar, who had skipped a batting stint in the team’s net session on the opening day of the three-day conditioning camp yesterday, also did not come in to field when his side - India A - came on to field in today’s afternoon session.Yesterday, he had confined himself to a fitness routine at the indoor gymnasium in the Eden Gardens before doing some physical exercises on the ground.