The UEFA Women's Champions League comprises a qualifying group stage, four rounds of two-legged knockout ties and a one-off final.
The lower-ranked champion clubs compete in four-team, one-venue mini-tournaments hosted by one of the participants.
The qualifying round winners join the teams given a bye past that stage in the round of 32. From here on the competition consists of two-legged knockout ties, continuing with the round of 16, quarter-finals and semi-finals played over two legs. If scores are level after 90 or 120 minutes of the second leg, the team with the most away goals wins, otherwise a penalty shoot-out is held.
The final is on 1 June at Cardiff City Stadium, two days before the men's final at the National Stadium of Wales.
Further details, including the criteria for separating teams that finish level on points in a group, can be found in the official competition regulations.
Playing career: Barry Town, Millwall Lionesses, Southampton Saints, Arsenal, New York Magic (loan)
Coaching career: Reading, Wales
Wales caps/goals: 61/19
Honours: UEFA Women's Cup (1), English league (11), FA Women's Cup (8), English League Cup (6)
• The daughter of a professional footballer and coach, Jayne Ludlow was a fine track and field athlete in her youth in the long jump and triple jump, where she held the British Under-17 record, also representing Wales at basketball and netball.
• Football was her "first love", however, and the midfielder first played for local club Barry Town before moving to study at the University of Pennsylvania, only to cut short her stay.
• After spells with Millwall and Southampton while studying physiotherapy in London, Ludlow signed for Arsenal aged 21 in 2000 and would remain there 13 years.
• Ludlow scored 28 goals in her first Gunners season as they won the English treble, and during her Arsenal career they dominated the domestic scene as well as emerging triumphant in the 2006/07 UEFA Women's Cup.
• Wales captain Ludlow retired from playing in July 2013 having netted more than 200 Arsenal goals. She was appointed Reading's manager shortly after.
• In October 2014 Ludlow became Wales coach.
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