The Black Cats are currently 18th in the able and needing wins desperately.
The Black Cats are currently fighting against relegationin a survival battle that looks set to go right down to the wire.
At present they sit 17th in the table and a point from safety, but have a crucial game in hand over Newcastle United that could prove the difference.
Last weekend saw them draw 1-1 with Stoke City, with a last gasp penalty from Defoe sealing a vital point.
It could be that the draw proves crucial come the end of the season, and Defoe says their manager has instilled an avoid defeat attitude in them from day one.
“We have some massive games coming up and they’re games we need to win,” he told safc.com.
“The manager has always said if you can’t win the game then you don’t lose it because you can get a point and it all adds up at the end of the season.”
“Everyone worked hard; Stoke is a difficult place to come and they’re a good team, but we got the luck at the end with the penalty we scored it to get the point. We will take that and now we move forward."
Just as against Stoke, Defoe is likely to be key to them securing those wins they need in the games remaining.
The striker has been in impressive form for his side this season with 14 Premier League goals to his name while the rest of the squad has struggled to chip in.
Indeed, as far as Allardyce is concerned his side would already be relegated were it not for Defoe, and they will be hoping he has more left to give in their final three games.