Dotto stated at recent trials, bringing together U-17 and U-20 footballers from various parts in Tanzania at Bora ground in the city, that trials mean a lot to youthful footballers.
He noted the trials are the right way to prepare a top-level player for participation in major tournaments in the future.
According to the tactician, such a session is also targeting to identify youthful footballers seeking to compete in Mainland U-20 Premier League.
About 350 junior players participated in the session, which took place a the ground from August 19 to last weekend.
Dotto revealed: ''We had 350 youthful players in the U-20 category and 15 footballers in the U-17 category. When you are looking for the talent you should as well focus on age.''
The tactician revealed: ''We have spotted 15 junior players to be included in the U-17 category.''
Dotto pointed out that the exercise involved not only youthful footballers from various parts of the city but also youngsters from other regions in the country.
The coach noted: ''We had junior footballers from Dodoma, Shinyanga, Tabora, and Kigoma.''
Coach Dotto pointed out financial constraints were the biggest challenge that he and fellow coaches that were overseeing the sessions faced.
Dotto stated they would have preferred to reach out to junior players in other regions, the coaches however can hardly meet travel expenses.
The tactician pointed out such a challenge could have been solved if individuals and firms had invested in the initiative.
Failure by a good number of junior footballers to possess such attributes like good height, much as the players are talented, also turns out to be a challenge, the coach revealed.