UEFA says it's waiting for official match reports before weighing disciplinary action against Arsenal following its heated Champions League loss in Barcelona.
UEFA says it expects to study reports from Swiss referee Massimo Busacca and match delegate Dane Jost of Slovenia and decide later on Wednesday.
Arsenal coach Arsene Wenger verbally confronted Busacca on the touchline after his team's 3-1 loss, and the dispute reportedly continued in the tunnel.
Wenger and Arsenal forward Robin van Persie both risked UEFA sanctions by criticizing Busacca in interviews after Barcelona advanced to the quarterfinals 4-3 on aggregate.
Van Persie was sent off for receiving a second yellow card at 1-1 in the 56th minute.