Sporting Lisbon striker Viktor Gyökeres on Saturday failed to report for pre-season training amid his ongoing transfer standoff.
Gyökeres is reportedly eager to secure a move to Arsenal this summer and is willing to do whatever it takes to force the transfer.
The 27-year-old was expected to return to camp by 5 pm local time on Saturday but was absent, prompting Sporting to consider disciplinary measures.
The Guardian reports that the Portuguese champions are now preparing to take internal action against Gyökeres.
Club officials are awaiting an official explanation from the player that might justify his absence, such as a medical condition, an approved extension for personal leave, or a family emergency.
Arsenal are believed to have submitted a €65 million bid, with a further €15 million in performance-related add-ons, but Sporting are holding out for a guaranteed €70 million plus an additional €10 million in bonuses.
