Arsenal have been a very busy club in the transfer window over the past few weeks as they look to build a Premier League-winning squad for next season. The arrivals of Martin Zubimendi and Christian

Gyokeres stirred controversy by skipping pre-season training with Sporting last week amidst ongoing transfer negotiations. Sporting's president Frederico Varandas has confirmed that the club intends to penalise the forward.

Meanwhile the fact the Swedish star won't return to Portugal has been heavily reported on. Gyokeres has not reported for pre-season training whilst Arsenal hash out a transfer, leading Sporting's president, Frederico Varandas, to threaten disciplinary charges against his own player.