Arsenal have announced David Luiz has signed a one-year contract extension with the club, while loanees Cedric Soares and Pablo Mari have penned permanent deals.
Dani Ceballos, meanwhile, will remain with the club until the end of the 2019-20 Premier League season but there is no news over Bukayo Saka or Pierre-Emerick Aubameyang, who are contracted to the Gunners until 2021.
Veteran defender Luiz's deal with the Gunners was set to expire at the end of the month, and there had been doubts about whether the club would want to keep him following a series of erratic performances.
That included him being sent off 25 minutes after coming on as a substitute against Manchester City last week, with Luiz having also conceded a penalty and made a mistake that led to Raheem Sterling's opening goal in the same game.
However, the 33-year-old's experience - plus the lack of viable alternatives amid the coronavirus pandemic - has seen Arsenal move to keep him at the club.
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As well as Luiz, the north Londoners have signed right-back Cedric on a permanent deal from Premier League rivals Southampton, while central defender Mari joins on a full-time basis from Flamengo.
The deals, described by Arsenal as "long-term", are understood by Goal to be four-year contracts for both players.
Both Cedric and Mari have been signed permanent despite their injury issues - the former having not yet made his Arsenal debut because of a series of setbacks, while Mari suffered a serious ankle injury against Manchester City which is set to keep him out for the remainder of this season.
Cedric was suffering with a knee injury when he arrived and didn’t feature before lockdown. He subsequently needed to undergo a small procedure on his nose following an injury in training but is now aiming to be available for Sunday’s FA Cup quarter-final tie at Sheffield United.
Attacking midfielder Ceballos, meanwhile, has also seen his temporary loan move from Real Madrid extended until the end of the 2019-20 campaign, with coronavirus forcing the Premier League to continue beyond June 30.
Arsenal technical director Edu told the club's official website: "I am really happy that we will have these players in our squad for the future. They have been part of the long-term technical plan Mikel and I have developed. They bring the right balance to our squad.
"David is a really important player for us. He has played most of our matches this season and has been important for the team. His passing, his communication with the team on and off the pitch. He helps everyone.
"With Pablo we’re all disappointed he got injured at Manchester City. Since Mikel arrived here he was asking for a central defender who was left-footed. We were really pleased with Pablo - his behaviour, the way he is training, his mentality and his quality. Unfortunately, he has that injury but of course we are really happy to keep him for the future.
"Cedric is also going to be an important player. He has been unlucky with the injuries but he is close to being ready and gives us more strength in the right-back position. We’re also pleased Dani will finish the season here. He is making a good contribution and we look forward to him having a strong finish to the season."
