REUTERS SPORTS SCHEDULE AT 1400 GMT/1000 ET

Here are the top sports stories and upcoming coverage plans for Reuters text service as of 2 p.m. GMT/10 a.m. ET. For a full schedule of news and events, go to our editorial calendar on Reuters Connect https://www.reutersconnect.com/planning or on Media Express http://mediaexpress.reuters.com/planning-tools/calendar. TOP STORIES

BASKETBALL-NBA-NOWITZKI Retired Nowitzki could see himself as coach in a few years

Retired NBA champion Dirk Nowitzki, who spent 21 seasons at the Dallas Mavericks, could see himself returning to basketball as coach or manager in a few years time, the German said. SPORT-DOPING

Drug testing methods stuck in the 1970s, says former WADA head Drug testing methods in sport are still rooted in the 1970s and better technology is needed to catch more than “dopey dopers”, former World Anti-Doping head David Howman said on Tuesday.

OLYMPICS-2020-SCHEDULE Tokyo 2020 marathons to start early due to heat fears

Next year’s men’s and women’s Olympic marathons will start at 6 a.m. local time to try to avoid the worst of Tokyo’s blazing summer heat, organizers said on Tuesday. UPCOMING

SOCCER SOCCER-CHAMPIONS-FCB-MUN/REPORT

Soccer - Champions League quarter-finals - Barcelona v Manchester United Barcelona host Manchester United in a Champions League quarter-final second leg match.

16 Apr 15:00 ET / 19:00 GMT SOCCER-ENGLAND-BRH-CDF/REPORT

Soccer - England - Premier League - Brighton & Hove Albion v Cardiff City 16 Apr 14:45 ET / 18:45 GMT

SOCCER-CHAMPIONS-POR-LIV/PREVIEW (PIX) (TV) Soccer - Champions League - FC Porto news conference & training

FC Porto prepare for the second leg of their Champions League quarter-final against Liverpool. 16 Apr 10:00 ET / 14:00 GMT

SOCCER-CHAMPIONS-POR-LIV/PREVIEW (PIX) (TV) Soccer - Champions League - Liverpool news conference

Liverpool manager Juergen Klopp and a player speak to the media ahead of the second leg of their Champions League quarter-final away to FC Porto. 16 Apr 14:00 ET / 18:00 GMT

SOCCER-CHAMPIONS-JUV-AJA/REPORT Soccer - Champions League - Juventus v Ajax Amsterdam

Juventus host Ajax Amsterdam in a Champions League quarter-final second leg 16 Apr 15:00 ET / 19:00 GMT

SOCCER-CHAMPIONS-FCB-MUN/ Soccer - Champions League - Barcelona v Manchester United reaction and follow ups

Reaction and follow ups from Barcelona v Manchester United in the Champions League quarter-final second leg. 17 Apr 05:00 ET / 09:00 GMT

TENNIS TENNIS-MONTECARLO/ (PIX) (TV)

Tennis - ATP 1000 - Monte Carlo Masters Action from second and third round matches at the Monte Carlo Masters in Roquebrune-Cap-Martin, France.

17 Apr 05:00 ET / 09:00 GMT RUGBY

RUGBY-UNION-WORLDCUP-WAL/KITAKYUSHU (PIX) (TV) Rugby Union - Welsh rugby paints Japanese city red ahead of World Cup

Kitakyushu will not be hosting any Rugby World Cup games later this year, but this hasn't stopped them getting into the spirit of the tournament. With Wales using Kitakyushu as their home base before the tournament starts, local people are throwing their weight behind Warren Gatland's men. In return, the Welsh team hope to leave a lasting rugby legacy in the southern Japanese city. 17 Apr 03:00 ET / 07:00 GMT