Sissoko said: "We are struggling since the beginning of the season. Why? I don't know, because we are trying our best, but it's not working.
“We see today it was a difficult game against a good team.
"We couldn't keep the score, so we have a lot of frustration, but we need to keep going.
“We have to stick together and try to work hard and come back stronger. That is the only way to perform.
Tottenham star admits ‘it’s not working’ after Sheffield United draw (Image: GETTY)
"Every team can have difficult moments. Since a few weeks we are struggling and that's football.
“What can you do? Keep working, give your best every day 'til everything turns around.
"We know we have a good squad with a lot of quality. We know we can do better and have to do better.
“Hopefully we'll go away, have some wins with our national teams, and this will give us confidence. The season is still long, in the Champions League we are doing well."
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