The 27-year-old Ivory Coast international only moved to Serie A in January, agreeing a switch from Russian outfit CSKA Moscow. He impressed during his short stay in Italy, scoring two goals in 14 games, although not living up to his previous prolific goal record earlier in his career.
During his time with CSKA, he scored an incredible 84 goals in 129 games, also registering 38 assists, whilst he netted 58 times in 79 games with BSC Young Boys. Those leagues may be weaker than Serie A or the Premier League, but he has shown all the talent to excel.
Having only signed him in January, it could be expected that Roma would not be looking to sell Doumbia already this summer, but the report states that they are actually willing to sanction a deal.
The Giallorossi are willing to loan him out for the 2015/16 season with an obligation to buy the forward at the end of the deal, to guarantee they make no loss on the fee they paid in January.
It is indicated that they are pushing for at least £10 million for his signature in the obligation to purchase, but there are yet no indications as to how either the Hammers or Watford feel about such a price.