There are lots of things to consider before betting on a player and one of those factors is age... just because an athlete has an history of good performance doesn't mean that they can keep it up continuously because as time goes on their body begins to slow down due to the fact that they may no longer be in their prime ...The wise thing to do in such a situation is to closely watch the athlete for a while
Aside their age, we must also check to know if they are still in the est position to play and perform even if not as before, but having higher tendencies for winning than losing, which is a critical past of it all, we can't because of favourite denied ourselves from winning or facing the real fact, if we play a bet on such, then we have more confidence that they are going to deliver and if this is not visible, then it's more better that we don't attempt at all in supporting them for a win, as we know they can't deliver.