West Ham are set to complete the £35.5m signing of Gianluca Scamacca after agreeing personal terms with the Sassuolo striker. The 23-year-old is due to fly to London on Monday night and undergo a medical on Tuesday. West Ham, who will pay £30.5m plus £5m in add-ons, have offered the Italy international a five-year deal with the option of an extra year. David Moyes, who is also trying to sign Eintracht Frankfurt’s Filip Kostic, has been looking to provide Michail Antonio with competition up front. West Ham bid £30m plus add-ons for Armando Broja last week. They intensified their pursuit of Scamacca after Chelsea dithered over selling Broja. Scamacca scored 16 goals in 36 appearances in Serie A last season. A former academy player at Roma, the tall and powerful striker joined Sassuolo from PSV Eindhoven in 2017. The deal will raise West Ham’s hopes of mounting another challenge for a place in the top four. They have signed Alphonse Areola to compete with Lukasz Fabianski in goal, added Nayef Aguerd in central defence and increased their depth in midfield by buying Flynn Downes. Moyes is keen to bring in a left-sided player and West Ham, who lost out on Jesse Lingard to Nottingham Forest last week, remain in talks with Eintracht over a deal for Kostic. They have made a £12.75m bid for the 29-year-old Serbia international, who has a year left on his deal. There are doubts over whether Kostic, who can play at left wing and left wing-back, wants to leave Eintracht after their qualification for the Champions League. West Ham are also considering a move for Leicester’s Luke Thomas and watched the Blackburn striker Ben Brereton Díaz during his side’s pre-season friendly against Lincoln last Saturday. Moyes is looking to bring in an additional midfielder. West Ham have submitted two offers for Lille’s Amadou Onana, but with that deal dragging on they have registered interest in Napoli’s Piotr Zielinski. Moyes is also a long-term admirer of Zielinski’s fellow Napoli midfielder Fabián Ruiz, who would not be cheap.