double-team
US /ˈdʌb.əlˌtiːm/
UK /ˈdʌb.əlˌtiːm/

1.
to guard or defend an opponent in a sport with two players
:
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The defense decided to double-team the star forward to limit his scoring.
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It's hard to score when they double-team you every time you get the ball.
2.
to assign two people to work together on a task or project
:
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For this complex coding task, we decided to double-team it with two senior developers.
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When a major client project comes up, we often double-team it to ensure quality and speed.