Arsenal's Kai Havertz Close to Yellow Card Suspension in Champions League

• Kai Havertz has received two yellow cards in the Champions League this season.
• Players face a one-match ban if they receive four yellow cards before the semi-finals.
• The yellow card suspension rule applies from the start of the league phase until the end of the quarter-finals.
• All yellow cards are reset after the quarter-finals.
• Havertz is among the players close to suspension due to the yellow card rule.