3 takeaways from Manchester City's Aguero-inspired victory over Crystal Palace

Sergio Aguero seems to have shaken off the remnants of his recurring injury issues.

The Argentine's two finishes before selflessly laying on a tally for David Silva followed a Fabian Delph opener, allowing Manchester City to storm to a comprehensive 4-0 win over misfiring Crystal Palace on Saturday.

The win fires a warning to City's title rivals: Manuel Pellegrini's side is back in the goals.

Here are the three main takeaways from Manchester City's dominant victory over Crystal Palace:

Hennessey undergoing worst preparation for Euro 2016

In the build up to Wales' first major tournament since 1958, Wayne Hennessey has been handed the opportunity of regular action at club level before he takes his starting role between the sticks for his country.

And he is making a meal of that chance.

He wasn't entirely convincing before he managed to drop a Joleon Lescott header between his legs in a 1-0 loss at Aston Villa last Tuesday, but he will face further questions after allowing a speculative Fabian Delph shot to skip past him Saturday.

Damien Delaney was blocking Hennessey's sightline when Delph struck the ball, and it took an unhelpful bounce as the 'keeper went down to gather it, but being beaten by such a hopeful, soft shot from that far out is inexcusable.

It's not as if Owain Fon Williams and Danny Ward - who let in goals for Inverness Caledonian Thistle and Liverpool reserves, respectively - are going to trouble his spot as Welsh No. 1. Still, this rough run of form must be worrying national team manager Chris Coleman and his side's claims to advance from Euro 2016's Group B.

Sergio Aguero hitting his rhythm

In a return to form that will concern the likes of Arsenal, Leicester City, and Tottenham Hotspur, Aguero is regaining his match sharpness after a couple of injuries in quick succession.

Last season's Golden Boot winner doesn't look short of confidence despite the crushing spells on the sidelines, and the teamwork played in his second - poking it to Yaya Toure before expertly edging his way into space to receive a Kevin De Bruyne assist - was superb.

He could have grabbed a hat trick too, with just the hapless Hennessey to beat toward the end, but instead slid the ball aside to Silva, who had the slightly easier task of slotting it home.

The lively Kelechi Iheanacho also made a decent account of himself before his 57th-minute withdrawal. Should he, Wilfried Bony, and Aguero all stay fit, City certainly has the parts to record its third title in five seasons.

That's 31 goals in Aguero's last 35 outings at the Etihad Stadium.

Has Demichelis silenced his critics again?

In Martin Demichelis' early days at Manchester City, the then-ponytailed playboy was not exactly popular. His scything down Lionel Messi in the Champions League effectively ended the club's first foray into its knockout stages, and he played the role of a fading veteran perfectly.

Later, though, his experience and cultured play came to the fore - in the regular absences of Vincent Kompany, he proved a fine deputy and positive influence alongside the usually shaky Eliaquim Mangala, and became one of City's more reliable performers.

At the start of this season, he regressed to his old ways - albeit with a better haircut. Leaden-footed, with poorer chances of maintaining a clean sheet than a drunken toddler in bed, observers again started to write off the 35-year-old and wish rumours of his return to Argentina were true.

With two clean sheets in his last two starts, however, he appears to have turned a corner yet again, forging a decent understanding alongside compatriot Nicolas Otamendi.

Should this particular flashback continue, City has the hallmarks of a title-winning outfit.