The Barcelona coach said he was not surprised Arsenal were such a hard nut to crack.
Barcelona suffered a 2-1 defeat at Arsenal and AS Roma's miserable run continued with a 3-2 home loss to Shakhtar Donetsk in Champions League last-16 first-round matches on Wednesday.
Arsenal shoved Chelsea off the top of the table but Leicester City's Jamie Vardy, with a dazzling hat-trick, was the man of the moment on Saturday as the struggling Premier League champions blew aside Manchester City 4-2.
Images from the English Premier League matches played on Sunday
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Arsenal, who fired Unai Emery as manager last week and appointed former player Freddie Ljungberg as caretaker boss, now sit 10th in the table on 19 points, with Brighton a single point behind and three places below them.
Newcastle United made light work of north-east rivals Sunderland as Alexander Isak's double secured a 3-0 win and a place in the FA Cup fourth round at the Stadium of Light on Saturday.
Liverpool moved back to the top of the Premier League with a 2-0 victory at struggling Burnley
Tottenham Hotspur hammered 10-man Aston Villa 4-0 in the Premier League on Sunday thanks to four second-half goals, allowing them to close the gap with their Birmingham rivals to two points in the chase for Champions League football next season.
Wenger departed in May after 22 years in charge having endured a barrage of criticism in the latter part of his reign for a tactical approach that resulted in 14 seasons without a Premier League title.
Arsenal eased past second-tier Reading 2-0 with Alex Oxlade-Chamberlain scoring twice, while Newcastle United romped to a 6-0 win over 10-man Preston North End and Hull City won 2-1 at Bristol City.
Germany expects 2.7 million people to attend matches in stadiums across the country and some 12 million in its fan zones for outdoor viewing, including on a long stretch of turf laid out in front of Berlin's Brandenburg Gate.
AC Milan grabbed a 1-1 draw at Manchester United in the blockbuster Europa League last-16 first-leg at Old Trafford on Thursday.
Arsenal, with Cesc Fabregas back pulling their strings, took full advantage of an 85-minute one-man advantage when they beat Manchester City 3-0 in a bruising Premier League battle at Eastlands Sunday.
Languishing mid-table, outplayed by teams he would fully expect to beat and with fans loudly questioning his judgement, Arsenal manager Arsene Wenger concedes his side have problems but is adamant he is the man to fix them.
Arsenal denied Chelsea the double with a 2-1 victory in an enthralling FA Cup final.
Spanish midfielder Santi Cazorla would be happy to sign a new contract with Arsenal despite local media linking him with a move to La Liga side Atletico Madrid.
SKY, Ishan, Faf, Rajat, DK... so many wonderful knocks to choose from...
Arsenal suffered a shock Europa League exit to Olympiakos Piraeus on away goals after a 2-1 extra-time home defeat, while Manchester United and Wolverhampton Wanderers cruised into the last 16 with emphatic aggregate wins on Thursday.
IMAGES from the English Premier League matches played on Sunday
Arsenal's hopes of catching Manchester City for second place in the Premier League suffered a setback.
Arsenal star player Theo Walcott, on Thursday, unveiled his latest tattoo on his Twitter account.
IMAGES from the Premier League match played between Liverpool and Luton at Anfield on Wednesday
Arsenal play away to City on Wednesday hoping to regain their grip on the title race after securing draws in their last three games.
Manager Arsene Wenger wants Arsenal to reinforce their title credentials by beating Manchester City in the Premier League on Sunday and called on his players to show no fear at the Etihad Stadium.
Wenger dropped Rob Holding for the visit to Stoke, preferring Shkodran Mustafi alongside Nacho Monreal and Sead Kolasinac at the back.
English newspapers had linked Sanchez with a move to Pep Guardiola's side in exchange for England forward Raheem Sterling.
If Arsenal win "for us it is not unusual but if we win tomorrow for Arsenal it would be a bad moment," said the Chelsea coach.
Liverpool striker Daniel Sturridge was substituted with a thigh injury as the English Premier League club beat Bayern Munich 3-0 in a pre-season match in Germany on Tuesday.
Former England captain Nasser Hussain hailed "magical" Jasprit Bumrah for his remarkable spell against England and felt that India pacer ended up being the difference between both sides in Vizag Test.
Manchester City tore Arsenal apart for the second time in five days on Thursday, beating them 3-0 on a freezing night at The Emirates to restore their 16-point lead as they close in on the Premier League title.
Arsenal goalkeeper Petr Cech believes that the Gunners need to stop silly losses against the teams they are expected to beat if they want to progress in the Premier League.
Arsenal's manager Arsene Wenger has revealed the secrets of Gunners' beautiful game that is universally regarded as the best football in England.
The hosts struggled to break down Arsene Wenger's side despite enjoying the majority of possession and will feel hard done by after crafting the best of the game's few openings in a lively game at Stamford Bridge.
Holders Arsenal's long unbeaten run in the FA Cup continued but they were frustrated by stubborn Championship leaders Hull City on Saturday, drawing 0-0 in a dreary fifth-round tie at the Emirates Stadium.
Manager Arsene Wenger has silenced his critics with Arsenal's rip-roaring start to the season, club great Dennis Bergkamp said on Friday.