The probability of this hitting are relatively much higher now that Lukaku has left to Chelsea. Not only will he be Inter's key striker expected to score their goals, but I also expect him to take the penalties Lukaku would've taken (he did this last season too when Lukaku wasn't on the pitch). The odds for this bet were the same before the news of Lukaku's transfer, so Unibet clearly hasn't taken the increased probability into consideration yet.