The Selecao are without a win in three matches after drawing on Thursday and their coach accepted his side were far from their best
Tite admitted he is struggling to get the most out of his players after Brazil's winless streak stretched to a third match with Thursday's 1-1 draw against Senegal.
Famara Diedhiou scored a penalty late in the first half of the friendly international to cancel out Roberto Firmino's ninth-minute opener at the Singapore National Stadium.
Brazil drew 2-2 with Colombia and lost 1-0 to Peru in last month's friendlies and are on their longest wait for a victory since 2013.