Seems to upset the balance of the team.
Times, Sunday Times
Pollution has upset the balance of the garden.
Times, Sunday Times
Avoid looking down as this will upset your balance.
Times, Sunday Times
Television was bound to upset that balance by giving the viewer an advantage over not only the spectator, but the referee and linesmen.
Times, Sunday Times
So, when changes that influence your work or lifestyle threaten to upset the balance, you're tempted to back out.
Times, Sunday Times