According to Article 18(18) of the Regulations of the UEFA Champions League, for all matches from the start of the round of 16 a club is permitted to register a maximum of three new eligible players by 3 February. That deadline has passed and here are the changes (click on the clubs to view full squad list):

Olivier Giroud is back from injury ©AFP/Getty Images

Arsenal FC

• In: Olivier Giroud, Francis Coquelin, Gabriel Paulista (Villarreal CF)

• Out: Joel Campbell (Villarreal CF, loan), Lukas Podolski (FC Internazionale Milano, loan), Yaya Sanago (Crystal Palace FC, loan)

AS Monaco FC

• In: Matheus Carvalho (Fluminense FC, loan), Alain Traoré (FC Lorient, loan)

• Out: Borja López (RC Deportivo La Coruña, loan), Lucas Ocampos (Olympique de Marseille, loan)

Bayer 04 Leverkusen

• In: David Yelldell

• Out: Niklas Lomb (Hallescher FC, loan), Levin Öztunali (SV Werder Bremen, loan)

Borussia Dortmund

• In: Kevin Kampl (FC Salzburg)

• Out: Jannick Bandowski (TSV 1860 München, loan), Miloš Jojić

Chelsea FC

• In: Juan Cuadrado (ACF Fiorentina), Isaiah Brown

• Out: André Schürrle (VfL Wolfsburg), Mohamed Salah (ACF Fiorentina, loan), Lewis Baker (Sheffield Wednesday FC, loan)

Club Atlético de Madrid

• In: Cani (Villarreal CF, loan), Fernando Torres (AC Milan, loan)

• Out: Alessio Cerci (AC Milan, loan), Cristian Rodríguez (Parma FC)

FC Barcelona

• In: None

• Out: None

FC Basel 1893

• In: Adama Traoré (Vitória SC)

• Out: Naser Aliji (FC Vaduz, loan), Marcelo Díaz (Hamburger SV), Michael Goncalves (FC Wil, loan), Geoffroy Serey Die (VfB Stuttgart), Giovanni Sio (SC Bastia, loan)

FC Bayern München

• In: Pepe Reina, Tom Starke

• Out: Pierre Højbjerg (FC Augsburg, loan), Ylli Sallahi (Karlsruher SC), Xherdan Shaqiri (FC Internazionale Milano, loan)

FC Porto

• In: Hernâni (Vitória SC), Helton, Diego Reyes

• Out: Adrián López, Andrés Fernández, Ivo Rodrigues (Vitória SC, loan), Kelvin (SE Palmeiras, loan), Tomás Mota

FC Schalke 04

• In: Joy-Lance Mickels, Matija Nastasić (Manchester City FC, loan)

• Out: Donis Avdijaj (SK Sturm Graz, loan), Christian Clemens (1. FSV Mainz 05, loan), Felipe Santana (Olympiacos FC, loan)

FC Shakhtar Donetsk

• In: None

• Out: Mykyta Kryukov (FC Illychivets Mariupil, loan)

Juventus

• In: Paolo De Ceglie (Parma FC, back from loan), Alessandro Matri (Genoa CFC), Stefano Sturaro (Genoa CFC, back from loan)

• Out: Kwadwo Asamoah, Sebastian Giovinco (Toronto FC), Federico Mattiello (AC Chievo Verona, loan), Rômulo

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Manchester City FC

• In: Wilfried Bony (Swansea City AFC)

• Out: Stevan Jovetić, Matija Nastasić (FC Schalke 04, loan)

Paris Saint-Germain

• In: None

• Out: Clément Chantôme (FC Girondins de Bordeaux)

Real Madrid CF

• In: Martin Ødegaard (Strømsgodset IF), Lucas Silva (Cruzeiro EC)

• Out: Abner, Guillermo Varela

Any surprises for you? Which teams do you reckon have strengthened the most? Let @ChampionsLeague know #UCL