10 THINGS WE LEARNED from EPL: De Gea's struggles and Robertson's importance

The Premier League title race continued at full throttle this weekend, as Manchester City and rivals Liverpool both picked up three points.

In the race for the top four, Manchester United and Chelsea shared the spoils while Tottenham and Arsenal were both beaten.

Here, AMITAI WINEHOUSE assesses 10 things we learned from the latest weekend of the top-flight season...

1) This is the finest title race in Premier League history and that's entirely because of the sheer quality of both teams involved.

For the first time in English football history, two teams have picked up more than 90 points in a top-flight season after Manchester City beat Burnley. Neither Liverpool nor City really deserve to miss out, but one will.

City have earned their place at the top with 12 wins in a row since their defeat at Newcastle. They would be rightful champions. As much, it must be said, as Liverpool would be.

2) There's something seriously wrong with David de Gea. His mistake against Chelsea was the latest in a litany of them.

He has now made three errors leading to goals in his last four games in all competitions – that's as many as he managed in the previous 123 games he played for Manchester United combined.

Maybe his head is no longer at Old Trafford. Maybe it is just a blip. Either way, he needs to sort it out.

3) Arsenal's slide is a serious problem for Unai Emery – it is so bad that it is unique in the recent history of the club.

They have not lost three in a row while conceding three each time since May 1966, when England had never won the World Cup and Arsene Wenger had not yet played league football. Arsenal have also lost four of their last five in the Premier League, as many as they lost in the previous 29.

Champions League football next season is still the aim but Arsenal have lost the solidity that hinted it was possible earlier in the season. If they think they can win the Europa League to secure it, playing like this, they have another thing coming.

4) Tottenham's lack of investment is not paying off in the Premier League and without some money being spent to improve the team, they will drop off sooner rather than later.

You simply cannot let it slide for this long. Their defeat by West Ham was their sixth in their last 10 Premier League games – having lost that many in their previous 28. They have also now lost 17 games in all competitions this season, last suffering more in a single campaign in 2008-09.

They have pushed through to the Champions League semi-finals, but as Chelsea showed years ago, it is possible to work your way through any cup competition. It is in the league that a lack of resources eventually catches up with you.

5) Andy Robertson will not jump out at anyone when Liverpool hand out their own player of the year award, not least with Mohamed Salah and Sadio Mane both bagging more than 20 goals in the Premier League.

However the left back has matched a record this season, providing 11 assists – as many as any other defender in the history of the Premier League has pulled off.

Liverpool are among the best sides the league has ever seen, even if they don't win the title. And Robertson has been key to that. Not bad for an £8million signing from a relegated side.

6) Scott Parker is doing a fine job of auditioning for the Fulham post after picking up three wins in a row.

That nine-point run over three matches is as many as they collected in their previous 20 games combined, across both Slavisa Jokanovic and Claudio Ranieri's spells in charge of the Craven Cottage club.

It is also the first time they have won three consecutive Premier League matches since March 2012. Parker may just have earned himself the gig on a full-time basis.

7) Ralph Hasenhuttl has done plenty well since taking charge of Southampton but there is one issue he clearly needs to fix.

If the Saints want to march up the table next season, they have to stop dropping so many points from winning positions. They have let 27 slip, more than any other team in the Premier League.

That is probably the difference between a relegation battle and guaranteed safety – or even better.

8) If Everton want to make the step up into the top six next season then they need to improve their form in the most bizarrely specific way possible – in London.

For some reason, the Toffees struggle whenever they find their way inside the M25 and have won just two of their last 20 away games against teams from London, drawing eight and losing 10 along the way. Whatever might be causing it, Everton just need more capital gains.

9) Name your best strike partnerships of all time. Who comes to mind? Dwight Yorke and Andy Cole? Thierry Henry and Dennis Bergkamp? Wayne Rooney and Dimitar Berbatov?

On the sly, Wolves have got a duo worth noting of their own. Diogo Jota has provided five assists in the league this season and they have all been for Raul Jimenez – the most-ever assists exclusively for one player in Premier League history.

Jimenez has already agreed to join Wolves permanently and that's some boost. When it comes to Jota–Jimenez, they have the chemistry of one part of the team all sewn up.

10) Brighton may not have picked up three points against Newcastle yet still might have managed something important.

They ended their run of 735 minutes without a goal and their solitary point may be enough to see them to safety, given the difficult fixtures coming up for both them and Cardiff – the Bluebirds need a win against a Crystal Palace side that are dynamite away from home. Brighton will struggle to win either of their last two but this might have just been enough.