Newcastle midfielder Sandro Tonali trained with his team-mates on Tuesday morning amid speculation that an investigation into breaches of betting rules was close to reaching a conclusion.

Reports from Italy have suggested the 23-year-old former AC Milan player could learn his fate before Wednesday night’s Champions League clash with Borussia Dortmund at St James’ Park, with some predicting a lengthy ban.

However, the Italy international was among the group which trained at the club’s Darsley Park training headquarters as they completed their preparations for the Group F fixture under grey skies and incessant rain.

Tonali’s representatives reportedly spent Monday in discussions with prosecutors, who launched an investigation while he was away on international duty earlier this month.

He and compatriot Nicolo Zaniolo, currently on loan at Aston Villa from Galatasaray, are subject to a probe by the Italian Prosecutor’s Office and Italian Football Federation (FIGC) in relation to illegal betting activity.

Tonali’s agent Giuseppe Riso had claimed the player was living with a “gambling addiction” and if breaches were found to have taken place, he could face many months on the sidelines.

The midfielder, who joined the Magpies in a £55million summer move from Milan, is accused of placing bets on the Rossoneri and former club Brescia during his time with them.

He has made 11 appearances to date for Newcastle, including a start in the 4-1 Champions League victory over Paris St Germain earlier this month.