Arsenal face Manchester United at the Emirates on Saturday, in one of the biggest games of the league season.

Given the nine goals the two teams scored combined in mid-week, there’s plenty of promise for the weekend match. Then again, it’s José Mourinho we’re talking about, so we’re just as likely to get a 0-0 draw.

Regardless, here’s who and what we think you need to watch out for on Saturday:

Will we get another Mesut masterclass?

Often questioned in the big games, Mesut was man-of-the-match against Tottenham a couple of weeks ago, and if he performs to the same standard on Saturday he’s sure to have an impact on the final result.

The German was fantastic against Huddersfield, scoring and assisting two in a matter of minutes to snatch the game away from the visitors, and couldn’t have asked for a better lead in to the match against United.

Özil is averaging more than four chances created per 90 minutes this season, far ahead of any of the other big-six playmakers, and Mourinho will almost certainly look to shut him down if he wants to have any chance of winning the match.

What Lukaku will show up?

Lukaku has had a mixed start to life in Manchester.

After scoring so many goals in the league early on, he now only has one since September. He’s also failed to turn up in the big games. In fact, half of Romelu’s league goals have come against teams currently in the relegation zone.

If Saturday is the day Lukaku finally decides to step up on a big stage, it could spell trouble for the Gunners.

But if he plays like he has been against any serious opposition this season, he won’t be a problem.

So the Romelu that turns up could be key.

Will Arsenal Arsenal up their defending?

Manchester United have had no trouble shutting teams out, with the best defensive record in the league.

The Gunners, on the other hand, have conceded seven goals to Manchester City and Liverpool alone.

That’s only one less than United’s tally for the season!

Arsenal, however, kept clean sheets against Chelsea and Spurs, and deserved them.

Monreal, Mustafi and Koscielny started both of those games as a trio, and missed the City and Liverpool matches, so perhaps they could make the difference.

Regardless of who starts, the Arsenal defence can’t play like they did in those big matches up north, because United won’t be giving up many chances to get back in the game.

Will Wenger and Mourinho carry on their feud?

Mourinho is pretty much the only manager in the league Arsène still has regularl  spats with.

The ignored handshake at Wembley, the shove at Stamford Bridge, and Mourinho’s endless press conference comments about the Arsenal manager, there’s always a bit of entertainment off the field as well as on it.

Wenger has finally put together a couple of wins over the Portuguese manager, and that hasn’t changed the dynamic much.

Both will be desperate for a win on Saturday.

I’d expect at least one flare up at some point, regardless of the result.

Who will Wenger turn to instead of Lacazette?

Will it be Danny Welbeck back to haunt his old club?

Alexis Sanchez making a return to the centre-forward position he played so often last season?

Olivier Giroud’s first Premier League start of the season?

The decision Wenger makes here could completely change the dynamic of the match, and with Lacazette ruled out, it’s the one guaranteed alteration to Wednesday’s team.

Whoever it is will have to put in one of their best performances of the season if the Gunners are going to come away with a win.