Australia captain James Horwill has been cited for stamping during the loss to the British and Irish Lions in the first test and will face a judiciary hearing.
The 28-year-old lock was cited for allegedly stamping or trampling on Lions counterpart Alun Wyn Jones in the third minute of last night's match.
''The medical team had a look at him (Wyn Jones) at halftime and put a couple of stitches in his eye at fulltime,'' Lions coach Gatland told a news conference today.
''The feeling from us is that it needed to be referred to the citing commission to have a look and for him to make a decision.
''For me, I played in the days when rucking was allowed and I've still got a few scars that bear the witness of some decent ruckings that I had. But the head was sacrosanct and you stayed away from that.''
The Lions held on to win the game 23-21 after the Wallabies' replacement fullback Kurtley Beale missed two late penalties, the second on the stroke of fulltime that could have won the game for the hosts.
Horwill will appear before the hearing in Melbourne later today, where both teams are travelling as they prepare for the second test next week.
The Lions also face the Melbourne Rebels in their final midweek clash of the tour on Tuesday.