Barca will have four of their new signings available to face Rayo Vallecano but one big name will still be missing for the LaLiga opener.
The Poland international is still in Munich but will fly to Miami on Sunday, where Barcelona will begin their pre-season tour, for a medical.
Chelsea boss Thomas Tuchel wants a new striker this summer. But will he favour Robert Lewandowski or Cristiano Ronaldo?
Lewandowski is eager to leave Bayern Munich before next season and Chelsea is reportedly a potential destination.
With Lukaku returning to Inter Milan, Chelsea are in the market for a new striker, with a report detailing five big name options being considered
Chelsea are looking for a replacement for Romelu Lukaku and they have not given up hope on signing Robert Lewandowski.
Barca and United have both been linked with Lewandowski, while De Jong could move from one to the other.
The Red Devils will go all out to sign the Poland ace and have three advantages over fellow interested party Chelsea.
TEAMtalk have been told why Robert Lewandowksi would make a seamless transition to Liverpool, if he replaced Sadio Mane at Anfield
Heavily linked with Barcelona, the Poland international has given his strongest indication of an exit yet.
The government sanctions currently in places mean Chelsea have not been able to keep up with competition
Talks between Bayern Munich and a Bundesliga forward could open the door for a move away from Germany for prolific striker Robert Lewandowski
Mane to Bayern has been touted and one observer has predicted what will happen with a move potentially hinging on a second deal.
Although his preference is Barcelona, a move to La Liga may not be straight-forward - and the Blues could pounce...
Liverpool may have a Premier League title on the line and a Champions League final to prepare for, but they also have serious contract issues pending.
Chelsea could need a replacement for Romelu Lukaku this summer and Lewandowski could be up for grabs after telling Bayern he wants out.
There has been talk of the striker having an agreement with Barcelona, but Bayern Munich have revealed their own plans for their star man
Never, ever have we seen Unai Emery as jubilant as this - and after stunning Bayern to reach the Champions League semis, we don't blame him
A source in Poland claims Robert Lewandowski has agreed a contract with Barcelona.
Could the striker be on the move in the summer? He and Barcelona have a mutual interest in each other - and a method to get the deal done
The Tottenham striker is on another level according to the Talksport pundit and would score more playing for Bayern Munich.
One of the very best in the world knows where he wants to be playing next - if his suitors can stump up a hefty amount required by Bayern
Liverpool have discovered their chances of signing Robert Lewandowski after the player's transfer preference was revealed by a report
A reunion between Klopp and his former Dortmund charge is on this summer, as per an ambitious report in the Spanish press
Manchester United have registered interest in a top-class striker whose situation is not as it seems, while a Tottenham star is in demand
'Anything is possible' when it comes to Man Utd's pursuit of a Bayern star, according to one journalist
Reports in Germany believe the star is heading for the Bayern Munich exit door - and claims are growing louder that a move to United is on
Man Utd are to making a big play for a new midfielder, Villa fancy a former Liverpool man, while West Ham are chasing a Spain forward
Man Utd are keeping tabs on Robert Lewandowski's future at Bayern Munich, according to a report
Arsenal are readying a move for Robert Lewandowski, a big-name sportsman wants to buy Chelsea, while Man Utd are nearer their new boss