OLLIE WATKINS heads Manchester United’s two man striker shortlist.But the Old Trafford side will not get involved in a bidding war for PSG keeper Gianluigi Donnarumma, leaving the door open for Chelsea and Manchester City to try to lure the Italian. GettyOllie Watkins has been in pre-season action for Aston Villa[/caption]Shutterstock EditorialGianluigi Donnarumma’s PSG future is looking in doubt[/caption]United are weighing up moves for either Aston Villa striker Watkins or Leipzig’s Slovenian front man Benjamin Sesko.That rules out any interest in Nicolas Jackson, despite Chelsea being increasingly keen to find a taker for the Senegalese attacker.And any move may only be feasible if United can move on Rasmus Hojlund, preferably on a full-time basis rather than a Marcus Rashford-style loan.With United having spent £130m to give boss Ruben Amorim his two top targets – Matheus Cunha and Bryan Mbeumo, the Old Trafford hierarchy do still want a line-leading upgrade.Contact has been made with the entourages of both potential targets, with Watkins’ proven Premier League experience a major plus The England striker, 29, has scored 75 top flight goals since moving to Villa Park.Before that, he was part of a successful attacking unit including Mbeumo at Brentford, a further tick in his box While Villa have dismissed all suggestions of an approach and insisted Watkins is not for sale at any price, they did offer him to Arsenal in the January window, before performing a U-turn after selling Jhon Duran instead.BEST ONLINE CASINOS – TOP SITES IN THE UKWatkins is more of a box player than Sesko – who was also on Arsenal’s summer wishlist – but has proven mobility and running power.At this stage, United are keeping both options open in case one becomes problematic. The Old Trafford club, aware of Villa’s public stance, recognise that negotiations may not be simple and could take until the latter days of the summer window next month.Selling Hojlund, and also commanding fees for Alejandro Garnacho and Antony would make meeting hefty price-tags more likely.Meanwhile, United have shelved their interest in Villa keeper Emi Martinez. A loan offer was made and rejected last week but the club’s current position is that Andre Onana will start the season as first choice. And that means no move for Donnarumma, whose contract stand-off with PSG has opened up the prospect he might be available.The Italian, with one year left on his deal with the Champions League winners, is seeking a significant mark-up in his £210,000 per week salary.But United are not willing to go there, meaning they will not rival City – who may lose Ederson and could be reluctant to make new signing James Trafford first choice, and Chelsea as potential Prem contenders.TRANSFER NEWS LIVE – KEEP UP WITH ALL THE LATEST FROM A BUSY SUMMER WINDOW