Arsenal manager Mikel Arteta says the online abuse of striker Kai Havertz and his wife has “terrible consequences” and needs to be “eradicated from the game”.

Havertz was criticised for his performance in Sunday’s FA Cup defeat by Manchester United, after he missed a glorious chance to win the game in normal time and then had his penalty saved in the shootout as United won 5-3 on penalties following the 1-1 draw.

The German’s wife Sophia shared screenshots of the “shocking” abuse she received on social media amid the game, including threats to the couple’s unborn child.

Arsenal have reported the abuse to the police and are working with a specialist data firm to identify the culprits, but Arteta says more must be done as he spoke before Wednesday’s north London derby against Tottenham.

“It’s incredible, honestly,” he said. “We really have to do something about it, because accepting that and hiding this has terrible consequences.

“It’s something we have to eradicate from the game because it’s so cynical and dependent to a result of an action.

“There is no other industry like this. When we played Ipswich on December 27, we won 1-0 and Kai Havertz scored. The whole stadium after that is singing the ‘Waka, Waka’ (his chant). That was 20 days ago. Where is the perspective?

“We are all responsible. That’s a really serious matter. It affects me. It affects him and everybody that is in the industry.

“We can accept it and say ‘that’s our job’, but there are certain limits and the line has to be drawn. We put a lot of attention on technology and what is next in football.

“What is next in football is that this should be prohibited. It cannot happen. That’s it.”

Meta, who own Instagram, removed the content for violating its policies.

Joao Fonseca had a Grand Slam debut to remember as he knocked out ninth seed Andrey Rublev in the first round of the Australian Open.

The 18-year-old Brazilian thrilled the crowd as he caused the biggest upset of the tournament so far with a 7-6 (7-1) 6-3 7-6 (7-5) victory against Rublev.

Fonseca was playing in his first main-draw match at a major, having come through three rounds of qualifying without dropping a set in Melbourne last week.

The victory extends his winning streak to 14 matches – but who is tennis’ latest rising star?

Manchester City are closing in on the signing of Palmeiras’ teenage defender Vitor Reis.

City have been in negotiations with the Brazilian club for a number of weeks and, after some resistance, have finally made a breakthrough in talks which the Premier League club believe will lead to 19-year-old Reis eventually joining them.

Palmeiras had hoped to keep Reis for next summer’s Club World Cup.

However, City sources believe if the deal, which is reported to be for £29.4m, is eventually concluded, Reis will join them immediately.

A Brazil under-17 international, Reis has made 18 league appearances for Palmeiras.

A right-footed central defender, it is intended Reis will form part of a reshaping of Pep Guardiola’s squad that is also planned to include Lens defender Abdukodir Khusanov, while talks are continuing with Eintracht Frankfurt over a deal for striker Omar Marmoush.

Speaking on Tuesday Palmeiras president Leila Pereira said she hoped that even if a transfer is agreed Reis would be able to stay until the end of the season.

“That would be my wish,” she said. “If we agreed on the price, we would sell him now and he would go after the [Club] World Cup. All of this is being discussed. It may not be possible.”