The Premier League giants confirmed the move at 12.30am on Tuesday morning.
Scot has not managed in the Premier League since he was sacked by Manchester United.
Catalan chief also discussed replacements in defensive roles and possible loan moves out.
The France international's return to Old Trafford was confirmed early Tuesday morning.
Portugal face Algeria in the Men's football event at the Rio 2016 Olympics on Wednesday.
Sean Dyche faces a tough scrap to avoid relegation.
Jose Mourinho has earmarked at least 4 players for departure this summer.
Viewers slam 'know-it-all' Al Trautwig for rudeness to Simone Biles and failure to understand adoption.
Argentina face Honduras in the men's football event at the Rio 2016 Olympics on Wednesday.
Wenger has spent 20 years in charge of Arsenal.
22-year-old defender has signed a six-year deal and becomes Pep Guardiola's eighth signing of the summer.
Catalan giants' final pre-season warm-up sees them taking on Serie A side in Joan Gamper Trophy.
The Frenchman said Yang 'p***es purple' after he won the 200m freestyle.
IBTimes UK examines Liverpool's hopes for the new 2016/17 Premier League season.
Rare show of unity praised as capturing the Olympic spirit of friendship.
The Jamaican has urged fans to keep faith with the sport.
23-year-old striker has agreed a four-year deal.
Liverpool, West Ham and three Bundesliga clubs are said to be monitoring the situation.
Inter Milan have ruled out selling Argentina striker Icardi this summer.
The American set a new Olympic record to finish first.
United confirmed the Frenchman's return in the early hours of Tuesday morning.
Everton are thought to be demanding £50m for the England international.
The 22-year-old progressed into the next round of the welterweight division.
The Serb suffered two defeats in the space of two days in Brazil.
The Spaniard is trying to win the domestic title in a third league.
Buckingham MP received two Royal Box tickets worth £7,790 from the All England Lawn Tennis Club.
Re-allocation of seats test patience as Rio Games kicks off with colour and character.
Great Britain looking for their first win as they play hosts Brazil on 9 August.
Pogba became Jose Mourinho's fourth signing for Manchester United this summer.
The Senegalese international has impressed since moving to Anfield earlier this summer.