Arsenal striker Danny Welbeck remains sidelined with a troublesome knee injury.

The 24-year-old has not played for the Gunners since the 0-0 draw with Chelsea in late April and is expected to be out until the end of the year after undergoing surgery last week.

Welbeck's absence has ben felt by the Arsenal squad and no more than Alexis Sanchez who took to social media to help motivate his colleague back to full fitness.

Mucha fuerza amigo espero que vuelvas pronto con el equipo para verte feliz como en la foto Much… https://t.co/mfYdoixQCQ
— Alexis Sánchez (@Alexis_Sanchez) September 9, 2015

Sanchez's message read: "Much strength my friend and I hope that you return to the team soon and to see you happy as in this photo."