Pep Guardiola is thinking about making signings in the January transfer window to bolster a Manchester City squad that sits 11 points clear at the top of the Premier League.
A 2-1 Manchester derby win at Old Trafford on Sunday - marred by an altercation in the tunnel after the match - extended City's already massive lead from their rivals even further.
City have won 14 Premier League games in a row, setting a new record for consecutive victories in a single season, despite injuries to Benjamin Mendy, John Stones and Vincent Kompany.
With City's defensive resources stretched despite heavy spending in the previous transfer window, Guardiola is prepared to bring in more new players in January.
"We are thinking about it," Guardiola told reporters ahead of Wednesday's visit to relegation-threatened Swansea City.
"In that department [defence] we have few, few, few, few players and to handle all competitions we are in trouble.
"With the club, with [director of football] Txiki [Begiristain], we are going to see what we do in January."
Injuries to Stones and Kompany have opened the door for Eliaquim Mangala to come back into Guardiola's thinking, the centre-back having been sent out on loan to Valencia last season.
Mangala was introduced as a second-half substitute at Old Trafford and Guardiola believes the physical strength of the France international will be an asset, although he was previously close to leaving the club.
"The reason why at half-time I didn't put Mangala on is I wanted to send a message to the players that we wanted to win the game," Guardiola said of Mangala being introduced for Gabriel Jesus - after Nicolas Otamendi put City back in front - with Ilkay Gundogan having been preferred as the replacement for injured captain Kompany.
"I wanted a good build-up against [Romelu] Lukaku and of course Nico [Otamendi] and [Fernandinho] they are stronger in that period.
"After we scored a goal I thought [Zlatan] Ibrahimovic is going to come on so I decided to put Mangala on and take off a striker because I wanted more control in the middle.
"Mangala, when he played for example at Leicester, under the long balls he is a strong player. He is not just going to help us in this moment when Vincent and John are injured but for the rest of the season.
"We were clear with Mangala that we wanted to find a [transfer] solution but when we didn't find it I met him in my office and said 'now you are our player, you will be treated like the other ones'.
"He has a quality that our other central defenders don't have and in some games he is going to help us."
|Lampard fined after accepting improper conduct charge|
|Serie B suspended after Pro Vercelli win appeal|
|Mitchell returns to England as defence coach|
|Brady completes Cornet upset in Guangzhou|
|Lopetegui giving no guarantees to ´fighter´ Navas|
|Di Francesco denies racially abusing Costa|
|Saunders apologises for ´sickening´ online video|
|Tianjin Quanjian 0 Kashima Antlers 3 (0-5 agg): Semi-final spot booked in resounding fashion|
|Madrid cannot live on Ronaldo´s glories, warns Ramos|
|Real Madrid are Champions League favourites, insists Man City coach Arteta|
|Stokes & Hales charged with bringing game into disrepute|
|Stephens slips to Vekic defeat in Tokyo|
|Simeone should teach Griezmann values - Ramos questions Ballon d´Or ambition|
|Arteta ready to step into Guardiola´s shoes after missing out on Arsenal job|
|Naive or scheming - Ozil´s agent slams Kroos, Neuer and Muller|
|Bolton´s Darby forced to retire after Motor Neurone Disease diagnosis|
|Root vows dressing support for Moeen over Ashes abuse claims|
|Madrid more dangerous without Ronaldo - Dani Alves|
|Federer fires ominous Djokovic warning to rivals|
|Arsenal confirm Gazidis departure to Milan|
|Man´s best friend? D´Arcy Short ruled out by dog bite|
|Salah has strong bond with ´friend´ Klopp|
|Mistakes were made in Serena´s US Open row - Federer|
|Burgess wants ´truth to come out´ over lewd video allegations|
|Injury brings premature end to Sharapova´s season|
|The next one´s mine - Griezmann underlines Champions League desire|
|A novice coach and a solar-powered stadium – who are Champions League debutants Young Boys?|
|Free-scoring Liverpool and PSG do battle, Kane eyes elite club - Champions League in Opta numbers|
|Braves fall to Cardinals, still move closer to clinching NL East|
|Mack leads Bears past Seahawks|
|Maradona makes winning start in Mexico|
|Barcelona captaincy has changed Messi, says Bartomeu|
|Lithuania qualify for FIBA World Cup after double-overtime win|
|Yelich makes history with another cycle|
|Silva: PSG, Liverpool have world´s two best attacks|
|It´s like a cow seeing a train – Pochettino uses unusual analogy to talk experience|
|Brady discusses Patriots´ trade for Gordon|
|Bills coach McDermott hasn´t spoken to Davis, says he ´didn´t feel a need´|
|Coutinho can´t explain Barcelona´s Champions League struggles|
|Henderson: Run to final can inspire Liverpool in Champions League|
|Eriksen: Everyone expects Kane to score a hat-trick every game|
|Gruden doesn´t regret decision to trade Mack|
|West Ham confirm Wilshere ankle surgery|
|Hughton hails Murray´s cool head as Brighton fight back again|
|It´s not good enough - Hojbjerg blasts Southampton|
|Patriots sign Josh Gordon from Browns|
|Southampton 2 Brighton and Hove Albion 2: Murray denies Saints after Hojbjerg howitzer|
|Wawrinka ready for Khachanov after battling past Bedene|
|Lozano: Joining Barcelona would be a dream|
|Players can fight for Messi´s shirt if they win, says Van Bommel|
|Kaymer tips Europe for Ryder Cup glory|
|Neymar to face Liverpool, confirms PSG´s Tuchel|
|Jardim backs Ronaldo to beat Griezmann in Ballon d´Or battle|
|Atletico will grow through hard work, says Simeone|
|Sorry Sri Lanka crash out of Asia Cup|
|Pochettino has no concerns over ´easy target´ Kane|
|Valverde expects PSV to attack|
|Salah ´sure´ Liverpool can win Champions League|
|Firmino misses training ahead of PSG clash|
|Joe Calzaghe´s father and trainer Enzo passes away|
|Coutinho: I have to improve a lot to earn Iniesta comparisons|
|Pochettino explains Trippier & Alderweireld absences for Inter clash|
|The quickest to 50 Premier League goals as Silva reaches milestone|
|Lampard: Derby can´t afford to sign Terry|
|Carson Wentz injury update: Eagles QB cleared to play Week 3 vs Colts|
|Verratti ban a blow for PSG - Henderson|
|Spalletti wants to have fun in ´Disneyland of football´|
|Alli, Lloris and Sissoko miss Inter-Tottenham in Champions League|
|West Ham´s Perez refutes suggestion he refused to warm up against Everton|
|Canelo-GGG drama lives up to the greats and demands third act|