The phrase "a weaker side" is correct and usable in written English.
It can be used to describe a less strong or less favorable aspect of something, such as a person's character, a team's performance, or an argument.
Example: "While the team has many strengths, they do have a weaker side when it comes to defense."
Alternatives: "a less strong aspect" or "a vulnerable point".
She enters the left door, placed on a "weaker" side of the screen.
It felt strange losing like that to a weaker side but I felt we had salvaged something from what could have otherwise been an awful day's cricket.
Then Özil, capitalising on the privilege of playing the No10 role against a weaker side, returned the favour 80 seconds later by crossing for Welbeck to score in much the same manner as he did for England in their 2-0 win against Switzerland a fortnight ago.
Only one of those changes was enforced, Bent starting in place of the injured Chris Martin but the players who came in included the Manchester United loanee, Jesse Lingard, and there was little evidence Derby were a weaker side for their presence.
What kind of a side will Kreis trots out, a weaker side that may still be able to beat the winless on the road Timbers, or do they go for the win and a chance to lock in a playoff spot?
Guernsey fielded a weaker side with on-island club sides in action , but had beaten Spelthorne 1-0 in a cup match last month with a young side.
The war-torn nation fielded a weak side that gave up goals in bunches to Iran, a medal contender.
If proof were still needed that this eager combatant also had a weak side, here it was.
Bangladesh, while they are increasingly a threat in one-day internationals, are still a weak side in the longest form of the game.
And it was not as if the Scot had selected a weak side, no doubt mindful of the need to win over Forest fans still angered and confused by Sean O'Driscoll's sacking.
However, Bosnaquet's bowling form remained erratic; in a minor match against a weak side, the opposing captain made a joke about his team's bowling being no worse than Bosanquet's.
