4 Manchester United
A long-time transfer target for the Red Devils, Arnautovic will provide much-needed competition to their Belgian striker Romelu Lukaku, who is so far having a very poor start to his season.
Manchester United are in need of a backup striker with Alexis Sanchez and Marcus Rashford being the only other alternatives for Jose Mourinho. After a poor start to the season, Manchester United sits 7th on the Premier League table, 12 points adrift of league leaders and reigning champions Manchester City.
The Red Devils may not be the force of yore but still is a European power to reckon with after proving themselves with a victory over Champions League favourites Juventus in Turin. The Austrian who previously played under Jose Mourinho in the famous Inter Milan team that won the treble in 2009/10 season, will be a suitable addition to Mourinho's side that is lacking a proper goal-scoring centre-forward.
3. AS Roma
The Roman side may not guarantee trophies but the Seria A side is one of the best teams on the planet and can fulfil the Austrian's dream of regular Champions League football. The Italian capital-based side has a young squad brimming with talent and an old attacking spearhead in Bosnian Edin Dzeko.
Though the start to the season of last year's Champions League semi-finalists has been rough with 19 points from their 12 matches, the Italian side is just 3 points behind the fourth-placed Lazio. The addition of Marko Arnautovic will surely provide an ample back-up or even a slight upgrade to their tiring warhorse Edin Dzeko, who so far has been vital in many of the matches for Roma for the past couple of years.
Marko Arnautovic has similar traits to Dzeko and can prove to be a better back-up than the young Patrick Schick, who is still learning the trade at the top level of Football.