Gabriel Martinelli ended his seven-month exile from the scoresheet as he netted a stunning hat-trick for Al Hilal.After Ollie Watkins found the opener in the Saudi Pro League clash, Martinelli found his first of the day on 18 minutes with a low finish.Martinelli ended his wait for a club-level goal by scoring three for Al HilalGettyThe former Arsenal winger’s second followed two minutes before the half-time whistle as he cut inside and fire into the bottom corner.Moments into the second half, Martinelli completed his treble with a tap-in on the line.There were 32 minutes separating the first and third goals, the last of which was his final contribution before being substituted.Martinelli has scored his first goals for Al Hilal since signing from Arsenal in a £60million move at the end of the summer window.He has also netted at club level for the first time in seven months.The 25-year-old’s most recent goal before his weekend performance came in Arsenal’s 4-0 FA Cup win over Wigan Athletic in February.New challenge for MartinelliJust weeks after winning the Premier League title, Martinelli finalised an exit from Arsenal.The forward totalled 62 goals and 36 assists in 278 appearances across seven seasons for the north Londoners.Martinelli was not named in their squads for the wins over Coventry City and Aston Villa at the start of this season amid exit speculation.Turkish giants Galatasaray made an initial enquiry to sign the Brazilian international and later submitted a verbal offer worth £38.4m.View Tweet: https://x.com/hashtag/%D8%A7%D9%84%D8%AA%D8%B9%D8%A7%D9%88%D9%86_%D8%A7%D9%84%D9%87%D9%84%D8%A7%D9%84?src=hash&ref_src=twsrc%5EtfwMartinelli scored his final goal for Arsenal in FebruaryGettyHowever, he rejected the move and eventually joined Al Hilal, with the £60m switch being a record sale for Arsenal.Leandro Trossard was another left winger to leave the Gunners as he joined Besiktas.Christos Tzolis was brought in from Club Brugge but, with a total of five forwards completing exits, Arsenal’s squad depth was questioned.talkSPORT’s Adrian Durham claimed that they have become ‘weaker’ now that the transfer window has closed.But Arsenal have already made an excellent start to the defence of their league title by winning all of their four opening matches.Victories against Coventry, Villa, Chelsea and Sunderland have put them top of the table with eight goals scored and one conceded.