Large Transport
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 204; Flight Crew Type 12796
Communication Breakdown; Situational Awareness; Distraction; Time Pressure
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Flight Crew Executed Go Around / Missed Approach
Procedure; Human Factors
We were cleared ILS 4R Approach; 170 knots till CITGO. Aircraft joined final ahead of us close; from the north; which is unusual. They checked-in with Tower 'back with you.' I saw us closing on this traffic ahead on final and started slowing prior to CITGO; at the same time Tower called '(Call sign)'; we responded; then Tower called again as if they didn't hear our reply. We were instructed to go around and turn left; we complied. Vectors back around for another ILS; complying with ATC assigned speed; re-cleared approach behind [another aircraft]. Tower told us to slow to final due to traffic ahead; we were already fully configured and decelerating through 10 knots above target speed. We landed on 4R. Along with our taxi instructions we were instructed to call Approach Control for a possible Pilot Deviation. I called [the] Manager Air Traffic Systems; and he called on our behalf.We complied with all ATC instructions; and I believe ATC did not provide proper spacing; or the other aircraft did not comply on our first approach attempt. The second approach; ATC was again concerned with spacing.
Air carrier Captain reported an aircraft turning in front of their aircraft on final into MDW. Pilot was then called by ATC and told to go around. Vectored back to final and landed without incident. Crew was advised to call ATC for possible pilot deviation.