Republic of Ireland boss Giovanni Trapattoni has warned the goalkeeper fighting for his Ireland place.
Having replaced Shay Given (since he announced his retirement from international football) his position is on the line.
The 28-year-old is Belgium international Simon Mignolet at SOL, and lacking match experience.
Westwood has made just three senior appearances for the Black Cats so far this season, all of them in the Capital One Cup.
Trapattoni is likely to hand Millwall's David Forde a start in Wednesday's friendly with Poland.
Trapattoni: "The goalkeeper is a particularly delicate position.
"I don't worry about an outfield player if he is not playing for his club, but a goalkeeper is alone on the pitch and (if he hasn't been playing) then it's more difficult psychologically.
"I hope Westwood can play in the future, but now the manager chooses Mignolet.
"I told him you can change club and you can play. But with Forde and (Stephen) Henderson we are okay. It's important we give Forde this opportunity."READING 2 SUNDERLAND 1 22. Simon Mignolet 4. Alfred N'Diaye 19. Titus Bramble 16. John O'Shea 14. Jack Colback 7. Sebastian Larsson 46' 8. Craig Gardner 15. David Vaughan 62' 21. Adam Johnson 26. Steven Fletcher 28. Stephane Sessegnon 79' Subs: 20. Keiren Westwood 2. Phil Bardsley 3. Danny Rose 46' 9. Danny Graham 79' 10. Connor Wickham 18. Kader Mangane 23. James McClean 62'
Sunderland fell to a late goal at the Madejski Stadium . but they were just one of a long line of clubs to suffer late in the game in recent weeks.
So what makes Reading the new Man Utd, picking up points in the dying seconds of a match?
More committment? Fitter players? Any suggestions anybody? Because Martin O'Neill could do with some tips.
Two-goal Jimmy Kebe (pictured right) was the Reading hero of the day, rather than the usual "Supersub" Adam Le Fondre. A late victory over West Brom last month and a brace from Le Fondre in a 2-2 draw against Chelsea in midweek had seen the Royals make a great start to 2013 and that continued at Sunderland's expense.
Kebe struck twice to book-end a game that had little quality on show as the Berkshire club opened up a two-point cushion on the Barclays Premier League bottom three.
A first-half Craig Gardner penalty looked for a long time like it would be enough for the Black Cats to claim a point but Martin O'Neill's side left the Madejski Stadium empty-handed.
Reading took the lead with the first meaningful attack of the game when Jobi McAnuff reached the byline before pulling the ball across to an unmarked Kebe, who controlled well before firing past Simon Mignolet.
The visitors failed to test Adam Federici in the Reading goal until the 24th minute. Alfred N'Diaye brushed off a couple of challenges before shooting low at the Australian, who could only push the ball into the path of the onrushing Sebastian Larsson but Federici was quickly back to his feet to keep out the follow-up.
Sunderland did not have to wait long to be gifted a chance to draw level.
Captain John O'Shea was chasing a clearance as Pavel Pogrebnyak slid in and brought the former Manchester United man down inside the area.
The foul was missed by referee Lee Mason but not by his assistant Simon Beck, who received heavy criticism from Sir Alex Ferguson last month - which has landed the United boss in hot water with the Football Association - and Gardner thumped the resulting penalty past Federici.
Reading almost regained their lead five minutes before the break as Pogrebnyak climbed to head Ian Harte's free-kick towards goal, only for Mignolet to claw the ball to safety.
It was the home side who returned from the interval as the brighter team with Harte's low free-kick palmed into the path of Pogrebnyak by Mignolet and the Russian striker crossed towards Alex Pearce, who could not get his header on target.
Pogrebnyak was involved again moments later as his clever touch sent the ball through the legs of his marker and into McAnuff, who was upended by David Vaughan.
Harte's free-kick cracked into the wall as the Royals looked to capitalise on a strong start to the half.
Despite their side being on top in the game the Reading fans soon started to sing for Adam Le Fondre to be introduced from the bench and Brian McDermott obliged, replacing Garath McCleary with the in-form frontman.
New signing Nick Blackman replaced Pogrebnyak with a little over 15 minutes remaining to partner Le Fondre but it was Adrian Mariappa who almost put Reading back in front.
Another set-piece from experienced full-back Harte saw Mariappa get in front of his man but his header came back off the crossbar.
Sunderland's debutant Danny Graham was the next player brought on to try to find a winner - but it was N'Diaye who should have given the visitors the lead with just 10 minutes left on the clock, only to fire wildly wide wide after he had been played in by Adam Johnson down the right flank.
Graham almost endeared himself to the Sunderland fans just minutes after coming on but his header was tipped over by Federici.
Sunderland were now looking the most likely to score a dramatic winner but Reading have made it their trademark of late and they struck again with five minutes remaining.
Once again Sunderland's defence could not deal with a Harte free-kick, as the former Republic of Ireland defender thrashed the ball to the back post where Kebe rose to head Reading back in front.
The Royals saw out the remainder of the game to move clear of Wigan and Aston Villa, who could only manage draws in their respective encounters.
Phillips added that he was looking to take on a coaching role after his playing career finishes.Pos Team P GD Pts 1 Man Utd 25 29 62 2 Man City 25 26 53 3 Chelsea 25 24 46 4 Tottenham 25 13 45 5 Everton 25 10 42 6 Arsenal 25 20 41 7 Liverpool 25 12 36 8 Swansea 25 6 34 9 West Brom 25 -1 34 10 Stoke 25 -6 30 11 West Ham 25 -8 30 12 Sunderland 25 -5 29 13 Fulham 25 -6 28 14 Norwich 25 -15 28 15 Newcastle 25 -11 27 16 Southampton 25 -11 24 17 Reading 25 -14 23 18 Wigan 25 -18 21 19 Aston Villa 25 -26 21 20 QPR 25 -19 17