5 5 1. Harry Kane – The Tottenham striker proved himself to be an old-fashioned poacher last season. Many of his 21 goals came from inside the 18-yard box, drawing comparisons to the way former Red Ruud van Nistelrooy used to play. However, no club relishes doing business with Spurs chairman Daniel Levy, particularly Manchester United. Ed Woodward may want to save his strength for negotiating a move for Hugo Lloris if David De Gea leaves. 5 2. Karim Benzema – The Real Madrid frontman has been linked with a move to Old Trafford every summer since he rejected Sir Alex Fergusons overtures in 2009. He often gets overlooked when talking about the Spanish sides superstars and with suggestions Cristiano Ronaldo could be set for more of a central role this season, Benzema could be on the move. Real Madrid and Manchester United have a strong recent history of transfers between them and negotiations would certainly be easier than any with Tottenham. 4. Robert Lewandowski – Again, it will be difficult to clinch a deal as a result of Rummenigges comments but the Polish strikers agent did not completely close the door. He said it would take a fee in excess of £35m and his client would be open to a move to the Premier League. Lewandowski probably represents the best option for United and would arguably take the least amount of time to settle into the Premier League (apart from Kane, obviously). 5 5 Manchester United have hit the ground running with their transfer activity this summer with four new recruits already through the door at Old Trafford.However, there have also been a number of exits leaving Wayne Rooney as the only senior striker in the squad following the departures of Robin van Persie and Ramadel Falcao.Originally, it looked like a two-way shootout between Edinson Cavani and Christian Benteke for Rooney’s new strike partner.But these targets look unlikely now, with Liverpool set to meet the Belgian’s £32.5m buyout clause and fans uncertain about whether Cavani is the man to lead the Red Devils to a 21st title.So who else is on Louis van Gaal’s radar? talkSPORT investigates the options … 3. Thomas Muller – Another player who has been linked with United a lot over the last few years. While not an out-and-out striker in the conventional sense, the German is a proven goalscorer, as well as a player who can perform in every attacking role on the pitch and would easily be able to work around Rooney, Angel Di Maria, Juan Mata and Memphis Depay. However, securing his services could be difficult with Bayern Munich not willing to help strengthen a Champions League rival. When revealing Bastian Schweinsteigers move to United, Bayern chairman Karl-Heinz Rummenigge said I can reassure all the fans we will not be selling another player to Manchester United. 5. Zlatan Ibrahimovic – On the surface this sounds more like fan fiction than fact but there is some plausibility in the move. Ibrahimovic is 33 years old and has played in all of Europes top leagues, except the Premier League and Bundesliga. There were reports in March of this year suggesting the Sweden international could well be on his way to Old Trafford. However, with Van Gaal trimming the wage bill with the departures of big earners such as Nani, Robin van Persie and Falcao, Ibrahimovic would have to take a pay cut from his current £200,000 a week contract.