TROUBLE AT THE TRAINING GROUND - WILSHERE VS FLAMINI

Arsenal duo Jack Wilshere and Mathieu Flamini were involved in a heated training ground discussion on Friday.

Just 24 hours before Arsenal's Barclays Premier League clash against Sunderland, the team-mates were pictured in an apparent disagreement at the club's London Colney training ground base. Bacary Sagna then looked to seemingly diffuse the situation by approaching Wilshere before putting his arm around the England midfielder.

The heated discussion between the two Arsenal stars comes only days after Flamini was involved in a very public spat with Mesut Ozil in their side's 2-0 defeat against Bayern Munich at the Emirates Stadium. 

The French midfielder tore into Ozil, apparently accusing the £42.5million signing of a lack of effort.

The flashpoint came in the second half after a Bayern move broke down and the ball is collected from behind the goal by Lukasz Fabianski.

Ozil points his finger accusingly in the direction of defender Laurent Koscielny but is given a stern rebuke by Flamini, leading to a little bit of pushing and shoving between the pair. 

Today, Ozil was urged not dwell on his penalty miss against Bayern Munich, according to Arsenal manager Arsene Wenger.

The Gunners' club-record signing apologised via Facebook for what proved to be a costly error when his chipped spot-kick was saved by German goalkeeper Manuel Neuer after eight minutes in the Champions League last 16 first leg clash.

The Bundesliga side went on to win 2-0 after goalkeeper Wojciech Szczesny was sent off for clattering Arjen Robben in the box. Although their resultant penalty was also missed, second-half goals from Toni Kroos and Thomas Muller all but ended Arsenal's European ambitions for another season.

Ozil made a promising start following his £42.5m signing from Real Madrid at the end of the summer transfer window, but has struggled to make an impact in the last few months.

Wenger says the latest setback must not be allowed to play on the Germany international's mind. 

'Is he over it now? Certainly not, because 48 hours is a short time to get over that, but it is part of the job as well to deal with disappointment and to show that you can respond to it,' the Arsenal manager said ahead of Saturday's clash against Sunderland.

'He apologised after the game, but I don't think people are shocked by the fact that he missed a penalty because Bayern missed a penalty as well.

'He takes his penalties in an unusual way so people are maybe a little bit less understanding, but everybody can miss penalties.

'It is his way, you accept it or not. It's his way of taking penalties like that.'